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The flora of the Santa Monica Mountions and adjacent habitats includes the following vascular plant species that are native, naturalized, and introduced, listed in alphabetical order.
- Abronia maritima S. Watson. Sand verbena. Nyctaginaceae
- Abronia umbellata Lam. ssp. umbellata. Nyctaginaceae
- Acer macrophyllum Pursh. Big-leaf maple. Aceraceae
- Acer negundo L. var. californicum (Torrey & A. Gray)
Sarg. Box elder. Aceraceae
- Achillea millefolium L. Yarrow. Asteraceae
- Achnatherum coronatum (Thurber) Barkworth. Poaceae
- Achyrachaena mollis Schauer. Blow-wives. Asteraceae
- Acourtia microcephala DC. Asteraceae
- Acroptilon repens (L.) DC. Russian knapweed. Asteraceae
- Adenostoma fasciculatum Hook. & Arn. Chamise. Rosaceae
- Adenostoma sparsifolium Torrey. Red shank. Rosaceae
- Adiantum capillus-veneris L. Southern maidenhair fern. Pteridaceae
- Adiantum jordanii C. Mueller. California maidenhair fern.
Pteridaceae
- Ageratina adenophora (Sprengel) R. King & H. Robinson. Asteraceae
- Agoseris grandiflora (Nutt.) E. Greene. Mountain-dandelion.
Asteraceae
- Agrostis exarata Trin. Poaceae
- Agrostis pallens Trin. Poaceae
- Agrostis stolonifera L. Creeping bent. Poaceae
- Agrostis viridis Gouan. Poaceae
- Ailanthus altissima (Miller) Swingle. Tree-of-heaven, stink
tree. Simaroubaceae
- Alisma plantago-aquatica L. Water plantain. Alismataceae
- Allium haematochiton S. Watson. Alliaceae
- Allium peninsulare Lemmon. Alliaceae
- Allophyllum glutinosum (Benth.) A. D. Grant & V. Grant. Polemoniaceae
- Alnus rhombifolia Nutt. White alder. Betulaceae
- Amaranthus albus L. Tumbleweed. Amaranthaceae
- Amaranthus blitoides S. Watson. Amaranthaceae
- Amaranthus californicus (Moq.) S. Watson. Amaranthaceae
- Amaranthus deflexus L. Amaranthaceae
- Amaranthus retroflexus L. Amaranthaceae
- Amblyopappus pusillus Hook. & Arn. Asteraceae
- Ambrosia acanthicarpa Hook. Annual bursage, sand-bur. Asteraceae
- Ambrosia chamissonis (Less.) E. Greene. Beach-bur. Asteraceae
- Ambrosia confertiflora DC. Asteraceae
- Ambrosia psilostachya DC. Western ragweed. Asteraceae
- Ammannia coccinea Rottb. Lythraceae
- Ammophila arenaria (L.) Link. European beachgrass. Poaceae
- Amorpha californica Nutt. var. californica. False
indigo. Fabaceae
- Amsinckia menziesii (Lehm.) Nelson & J. F. Macbr. var. intermedia
(Fischer & C. Meyer) Ganders. Common fiddleneck. Boraginaceae
- Amsinckia menziesii (Lehm.) Nelson & J. F. Macbr. var. menziesii.
Rancher's fireweed. Boraginaceae
- Anagallis arvensis L. Scarlet pimpernel, poor-man's weatherglass.
Primulaceae
- Ancistrocarphus filagineus A. Gray. Woolly fishhooks. Asteraceae
- Andropogon glomeratus (Walter) Britton, Sterns & Pogg. var.
scabriglumis C. S. Campbell. Bushy bluestem. Poaceae
- Anemopsis californica (Nutt.) Hook. & Arn. Yerba mansa. Saururaceae
- Anthemis cotula L. Mayweed, stinkweed, dog-fennel. Asteraceae
- Antirrhinum coulterianum Benth. Scrophulariaceae
- Antirrhinum kelloggii E. Greene. Scrophulariaceae
- Antirrhinum multiflorum Pennell. Scrophulariaceae
- Antirrhinum nuttallianum Benth. ssp. subsessile
(A. Gray) D. Thompson. Scrophulariaceae
- Aphanes occidentalis (Nutt.) Rydb. Rosaceae
- Apiastrum angustifolium Nutt. Wild-celery. Apiaceae
- Apium graveolens L. Celery. Apiaceae
- Apocynum cannabinum L. Indian hemp, dogbane. Apocynaceae
- Aptenia cordifolia (L. f.) N. E. Brown. Baby sun rose. Aizoaceae
- Arabis glabra (L.) Benth. var. glabra. Tower-mustard.
Brassicaceae
- Arabis sparsiflora Torrey & A. Gray var. californica
Rollins. Brassicaceae
- Arctostaphylos glandulosa Eastw. ssp. glandulosa.
Ericaceae
- Arctostaphylos glauca Lindley. Ericaceae
- Aristida adscensionis L. Six-weeks three-awn. Poaceae
- Artemisia biennis Willd. Asteraceae
- Artemisia californica Less. California sagebrush. Asteraceae
- Artemisia douglasiana Besser. Mugwort. Asteraceae
- Artemisia dracunculus L. Tarragon. Asteraceae
- Arundo donax L. Giant reed, reed cane. Poaceae
- Asclepias californica E. Greene. California milkweed, round-hooded
milkweed. Asclepiadaceae
- Asclepias eriocarpa Benth. Kotolo milkweed, Indian milkweed.
Asclepiadaceae
- Asclepias fascicularis Decne. in A. DC. Narrow-leaf milkweed.
Asclepiadaceae
- Aspidotis californica (Nutt.) Copel. California lace fern.
Pteridaceae
- Asplenium vespertinum Maxon. Aspleniaceae
- Aster lanceolatus Willd. ssp. hesperius (A. Gray)
Semple & J. Chmielewski. Asteraceae
- Aster subulatus Michaux var. ligulatus Shinners.
Asteraceae
- Astragalus brauntonii Parish. Fabaceae
- Astragalus didymocarpus Hook. & Arn. var. didymocarpus.
Fabaceae
- Astragalus gambelianus E. Sheldon. Fabaceae
- Astragalus pycnostachys A. Gray var. lanosissimus
(Rydb.) Munz. Fabaceae
- Astragalus tener A. Gray var. titi (Eastw.) Barneby.
Fabaceae
- Astragalus trichopodus (Nutt.) A. Gray var. lonchus
(M. E. Jones) Barneby. Fabaceae
- Astragalus trichopodus (Nutt.) A. Gray var. phoxus
(M. E. Jones) Barneby. Fabaceae
- Athysanus pusillus (Hook.) E. Greene. Brassicaceae
- Atriplex californica Moq. Chenopodiaceae
- Atriplex coulteri (Moq.) D. Dietr. Coulter's saltbush. Chenopodiaceae
- Atriplex lentiformis (Torrey) S. Watson ssp. lentiformis.
Big saltbush. Chenopodiaceae
- Atriplex leucophylla (Moq.) D. Dietr. Chenopodiaceae
- Atriplex polycarpa (Torrey) S. Watson. Chenopodiaceae
- Atriplex rosea L. Tumbling oracle, redscale. Chenopodiaceae
- Atriplex semibaccata R. Brown. Australian saltbush. Chenopodiaceae
- Atriplex serenana Nelson. Bractscale. Chenopodiaceae
- Atriplex triangularis Willd. Spearscale. Chenopodiaceae
- Atriplex watsonii Nelson. Chenopodiaceae
- Avena barbata Link. Poaceae
- Avena fatua L. Wild oat. Poaceae
- Avena sativa L. Cultivated oat. Poaceae
- Azolla filiculoides Lam. Azollaceae
- Baccharis douglasii DC. Marsh baccharis. Asteraceae
- Baccharis malibuensis R. M. Beauchamp & Henrickson. Asteraceae
- Baccharis pilularis DC. Chaparral broom, coyote brush. Asteraceae
- Baccharis plummerae A. Gray. Asteraceae
- Baccharis salicifolia (Ruiz L÷pez & Pavon) Pers. Seep-willow,
water-wally, mule fat. Asteraceae
- Barbarea othoceras Ledeb. Winter-cress. Brassicaceae
- Bassia hyssopifolia (Pallas) Kuntze. Chenopodiaceae
- Batis maritima L. Saltwort, beachwort. Bataceae
- Berberis pinnata Lagasca ssp. pinnata. Oregon-grape.
Berberidaceae
- Berula erecta (Hudson) Cov. Cutleaf water-parsnip. Apiaceae
- Beta vulgaris L. Beet. Chenopodiaceae
- Bidens frondosa L. Stick-tight. Asteraceae
- Bidens laevis (L.) Britton, Sterns & Pogg. Asteraceae
- Bidens pilosa L. Beggar-ticks. Asteraceae
- Bloomeria crocea (Torrey) Cov. Common goldenstars. Alliaceae
- Bothriochloa barbinodis (Lagasca) Herter. Cane bluestem.
Poaceae
- Bowlesia incana Ruiz L÷pez & Pavon. Apiaceae
- Boykinia occidentalis Torrey & A. Gray. Saxifragaceae
- Boykinia rotundifolia C. Parry. Round-leaved boykinia. Saxifragaceae
- Brassica nigra (L.) Koch. Black mustard. Brassicaceae
- Brassica rapa L. Turnip, field mustard. Brassicaceae
- Brickellia californica (Torrey & A. Gray) A. Gray. Asteraceae
- Brickellia nevinii A. Gray. Nevin's brickellbush. Asteraceae
- Briza minor L. Poaceae
- Brodiaea jolonensis Eastw. Alliaceae
- Bromus arizonicus (Shear) Stebb. Poaceae
- Bromus carinatus Hook. & Arn. var. carinatus. Poaceae
- Bromus carinatus Hook. & Arn. var. maritimus. Poaceae
- Bromus catharticus Vahl. Rescue grass. Poaceae
- Bromus diandrus Roth. Ripgut grass. Poaceae
- Bromus hordaceus L. ssp. hordaceus. Poaceae
- Bromus laevipus Shear. Poaceae
- Bromus madritensis L. ssp. rubens (L.) Husnot. Foxtail
chess. Poaceae
- Bromus tectorum L. Cheat grass, downy brome. Poaceae
- Bromus trinii Desv. Chilean chess. Poaceae
- Buddleya davidii Franchet. Butterfly bush. Buddlejaceae
- Buddleya saligna Willd. Buddlejaceae
- Calandrinia breweri S. Watson. Portulacaceae
- Calandrinia ciliata (Ruiz L÷pez & Pavon) DC. Red maids. Portulacaceae
- Calandrinia maritima Nutt. Seaside calandrinia. Portulacaceae
- Calochortus albus Benth. White globe lily, fairy lantern.
Calochortaceae
- Calochortus catalinae S. Watson. Catalina mariposa lily.
Calochortaceae
- Calochortus clavatus S. Watson ssp. pallidus (Hoover)
Munz. Calochortaceae
- Calochortus plummerae E. Greene. Plummer's mariposa lily.
Calochortaceae
- Calochortus splendens Benth. Calochortaceae
- Calochortus venustus Benth. Calochortaceae
- Calyptridium monandrum Nutt. Portulacaceae
- Calystegia macrostegia (E. Greene) Brummitt ssp. cyclostegia
(House) Brummitt. Convolvulaceae
- Calystegia macrostegia (E. Greene) Brummitt ssp. intermedia
(Abrams) Brummitt. Convolvulaceae
- Calystegia purpurata (E. Greene) Brummitt ssp. purpurata.
Convolvulaceae
- Calystegia soldanella (L.) R. Br. Beach morning-glory. Convolvulaceae
- Cakile maritima Scop. Sea-rocket. Brassicaceae
- Callitriche marginata Torrey. Callitrichaceae
- Camissonia bistorta (Torrey & A. Gray) Raven. California
sun cup. Onagraceae
- Camissonia boothii (Douglas) Raven ssp. decorticans
(Hook. & Arn.) Raven. Onagraceae
- Camissonia californica (Torrey & A. Gray) Raven. Onagraceae
- Camissonia cheiranthifolia (Sprengel) Raven ssp. suffruticosa
(S. Watson) Raven. Beach evening primrose. Onagraceae
- Camissonia hirtella (E. Greene) Raven. Onagraceae
- Camissonia ignota (Jepson) Raven. Onagraceae
- Camissonia intermedia Raven. Onagraceae
- Camissonia lewisii Raven. Lewis' evening primrose. Onagraceae
- Camissonia micrantha (Sprengel) Raven. Onagraceae
- Camissonia strigulosa (Fischer & C. Meyer) Raven. Onagraceae
- Capsella bursa-pastoris (L.) Medic. Shepherd's purse. Brassicaceae
- Cardamine californica (Torrey & A. Gray) E. Greene. Milk
maids, toothwort. Brassicaceae
- Cardamine oligosperma Torrey & A. Gray. Brassicaceae
- Cardaria draba (L.) Desv. Heart-podded hoary cress. Brassicaceae
- Cardaria pubescens (C. Meyer) Jarmol. White top. Brassicaceae
- Cardionema ramosissimum (J. A. Weinm.) Nelson & J. F. Macbr.
Caryophyllaceae
- Carex barbarae Dewey. Cyperaceae
- Carex praegracilis W. Boott. Cyperaceae
- Carex senta W. Boott. Cyperaceae
- Carex spissa L. Bailey. Cyperaceae
- Carex triquetra W. Boott. Cyperaceae
- Carpobrotus chilensis (Molina) N. E. Brown. Sea-fig. Aizoaceae
- Carpobrotus edulis (L.) N. E. Brown. Hottentot-fig, fig-marigold.
Aizoaceae
- Castilleja affinis Hook. & Arn. Scrophulariaceae
- Castilleja applegatei Fern. ssp. martinii (Abrams)
Chuang & Heckard. Scrophulariaceae
- Castilleja densiflora (Benth.) Chuang & Heckard. Scrophulariaceae
- Castilleja exserta (A. A. Heller) Chuang & Heckard ssp. exserta.
Purple owl's-clover. Scrophulariaceae
- Castilleja foliolosa Hook. & Arn. Scrophulariaceae
- Castilleja minor (A. Gray) A. Gray ssp. spiralis
(Jepson) Chuang & Heckard. Scrophulariaceae
- Caulanthus heterophyllus (Nutt.) Payson. Brassicaceae
- Ceanothus crassifolius Torrey. Hoaryleaf ceanothus. Rhamnaceae
- Ceanothus cuneatus (Hook.) Nutt. Rhamnaceae
- Ceanothus leucodermis E. Greene. Chaparral whitethorn. Rhamnaceae
- Ceanothus megacarpus Nutt. Big-pod ceanothus. Rhamnaceae
- Ceanothus oliganthus Nutt. var. oliganthus. Rhamnaceae
- Ceanothus spinosus Torrey & A. Gray. Red-heart, greenbark
ceanothus. Rhamnaceae
- Centaurea melitensis L. Tocalote. Asteraceae
- Centaurea solstitialis L. Barneby's thistle, yellow starthistle.
Asteraceae
- Centaurium venustum (A. Gray) Robinson. Canchalagua. Gentianaceae
- Centranthus ruber (L.) DC. Red valerian. Valerianaceae
- Cerastium glomeratum Thuill. Mouse-ear chickweed. Caryophyllaceae
- Cercocarpus betuloides Torrey & A. Gray var. betuloides.
Mountain-mahogany. Rosaceae
- Chaenactis artemisiifolia (A. Gray) A. Gray. Asteraceae
- Chaenactis glabriuscula DC. var. glabriuscula. Yellow
pincushion. Asteraceae
- Chamaebatia australis (Brandeg.) Abrams. Rosaceae
- Chamaesyce albomarginata (Torrey & A. Gray) Small. Euphorbiaceae
- Chamaesyce maculata (L.) Small. Euphorbiaceae
- Chamaesyce melanadenia (Torrey) Millsp. Euphorbiaceae
- Chamaesyce polycarpa (Benth.) Millsp. Euphorbiaceae
- Chamaesyce serpyllifolia (Pers.) Small. Euphorbiaceae
- Chamomilla suaveolens (Pursh) Rydb. Pineapple weed, rayless
chamomile. Asteraceae
- Cheilanthes covillei Maxon. Pteridaceae
- Cheilanthes newberryi (D. Eaton) Domin. Cotton fern. Pteridaceae
- Chenopodium ambrosioides L. Mexican tea. Chenopodiaceae
- Chenopodium berlandieri Moq. Chenopodiaceae
- Chenopodium californicum (S. Watson) S. Watson. Chenopodiaceae
- Chenopodium macrospermum Hook f. var. halophilum
(Philippi) Standley. Chenopodiaceae
- Chenopodium multifidum L. Chenopodiaceae
- Chenopodium murale L. Chenopodiaceae
- Chenopodium pumilio R. Brown. Chenopodiaceae
- Chenopodium strictum Roth var. glaucophyllum (Aellen)
Wahl. Chenopodiaceae
- Chloris gayana Kunth. Rhodes grass. Poaceae
- Chlorogalum pomeridianum (DC.) Kunth var. pomeridianum.
Soap plant. Hyacinthaceae
- Chorizanthe parryi S. Watson. Polygonaceae
- Chorizanthe staticoides Benth. Turkish rugging. Polygonaceae
- Chorizanthe wheeleri S. Watson. Polygonaceae
- Chrysanthemum coronarium L. Garland daisy, crown daisy. Asteraceae
- Chrysothamnus nauseosus (Pallas) Britton ssp. mohavensis
(E. Greene) H. M. Hall & Clements. Rubber rabbitbrush. Astereaceae
- Cichorium intybus L. Chicory. Asteraceae
- Ciclospermum leptophyllum (Pers.) Britton & E. Wilson. Apiaceae
- Cirsium occidentale (Nutt.) Jepson var. californicum
(A. Gray) Keil & C. Turner. California thistle. Asteraceae
- Cirsium occidentale (Nutt.) Jepson var. occidentale.
Cobwebby thistle. Asteraceae
- Cirsium vulgare (Savi) Ten. Bull thistle. Asteraceae
- Clarkia bottae (Spach.) H. Lewis & M. Lewis. Punchbowl godetia.
Onagraceae
- Clarkia cylindrica (Jepson) H. Lewis & M. Lewis. Onagraceae
- Clarkia epilobioides (Nutt.) Nelson & J. F. Macbr. Onagraceae
- Clarkia purpurea (Curtis) Nelson & J. F. Macbr. ssp. quadrivulnera
(Douglas) H. Lewis & M. Lewis. Onagraceae
- Clarkia unguiculata Lindley. Onagraceae
- Claytonia perfoliata Willd. ssp. perfoliata. Miner's
lettuce. Portulacaceae
- Clematis lasiantha Nutt. Pipestems. Ranunculaceae
- Clematis ligusticifolia Nutt. Virgin's bower, verba de chiva.
Ranunculaceae
- Collinsia heterophylla Buist. Chinese houses. Scrophulariaceae
- Collinsia parryi A. Gray. Scrophulariaceae
- Comarostaphylis diversifolia (C. Parry) E. Greene ssp. planifolia
(Jepson) G. D. Wallace. Ericaceae
- Conium maculatum L. Poison hemlock. Apiaceae
- Convolvulus arvensis L. Bindweed. Convolvulaceae
- Convolvulus simulans Perry. Convolvulaceae
- Conyza bonariensis (L.) Cronq. Asteraceae
- Conzya canadensis (L.) Cronq. Asteraceae
- Conzya coulteri A. Gray. Asteraceae
- Cordylanthus maritimus Benth. ssp. maritimus. Salt
marsh bird's-beak. Scrophulariaceae
- Cordylanthus rigidus (Benth.) Jepson ssp. setigerus
Chuang & Heckard. Scrophulariaceae
- Coreopsis bigelovii (A. Gray) H. M. Hall. Asteraceae
- Coreopsis calliopsidea (DC.) A. Gray. Asteraceae
- Coreopsis gigantea (Kellogg) H. M. Hall. Sea-dahlia. Asteraceae
- Cornus glabrata Benth. Brown dogwood. Cornaceae
- Coronopus didymus (L.) Smith. Wart cress. Brassicaceae
- Cortaderia jubata (Lemoine) Stapf. Poaceae
- Cortaderia selloana (Schultes) Asch. & Graebner. Pampus grass.
Poaceae
- Cotula australis (Sieber) Hook. f. Asteraceae
- Cotula coronopifolia L. Brass-buttons. Asteraceae
- Crassula connata (Ruiz L÷pez & Pavon) A. Berger. Pygmy weed.
Crassulaceae
- Cressa truxillensis Kunth. Alkali weed. Convolvulaceae
- Croton californicus Muell. Euphorbiaceae
- Crypsis vaginiflora (Forsskal) Opiz. Poaceae
- Cryptantha clevelandii E. Greene. Boraginaceae
- Cryptantha intermedia (A. Gray) E. Greene. Boraginaceae
- Cryptantha micromeres (A. Gray) E. Greene. Boraginaceae
- Cryptantha microstachys (A. Gray) E. Greene. Boraginaceae
- Cryptantha muricata (Hook. & Arn.) Nelson & J. F. Macbr.
Boraginaceae
- Cucurbita foetidissima Kunth. Calabazilla. Cucurbitaceae
- Cuscuta californica Hook. & Arn. var. breviflora
Engelm. Cuscutaceae
- Cuscuta californica Hook. & Arn. var. californica.
Cuscutaceae
- Cuscuta californica Hook. & Arn. var. papillosa
Yuncker. Cuscutaceae
- Cuscuta pentagona Engelm. Cuscutaceae
- Cuscuta salina Engelm. var. major Yuncker. Cuscutaceae
- Cynara cardunculus L. Cardoon, artichoke thistle. Asteraceae
- Cynodon dactylon (L.) Pers. Bermuda grass. Poaceae
- Cyperus eragrostis Lam. Cyperaceae
- Cyperus erythrorhizos Muhlenb. Cyperaceae
- Cyperus esculentus L. Yellow nut-grass. Cyperaceae
- Cyperus involucratus Rottb. Umbrella plant. Cyperaceae
- Cyperus niger Ruiz L÷pez & Pavon. Cyperaceae
- Cyperus odoratus L. Cyperaceae
- Cyperus rotundus L. Purple nutsedge. Cyperaceae
- Dactylis glomerata L. Orchard grass. Poaceae
- Datisca glomerata (C. Presl.) Baillon. Durango root. Datiscaceae
- Datura stramonium L. Jimson weed. Solanaceae
- Datura wrightii Regel. Solanaceae
- Daucus pusillus Michaux. Apiaceae
- Delphinium cardinale Hook. Cardinal larkspur, scarlet larkspur.
Ranunculaceae
- Delphinium parryi A. Gray ssp. parryi. Ranunculaceae
- Delphinium patens Benth. ssp. hepaticoideum. Ewan.
Ranunculaceae
- Dendromecon rigida Benth. Bush poppy. Papaveraceae
- Descurainia pinnata (Walter) Britton ssp. menziesii
(DC.) Detl. Brassicaceae
- Descurainia sophia (L.) Webb. Brassicaceae
- Dicentra ochroleuca Engelm. Papaveraceae
- Dichelostemma capitatum Alph. Wood ssp. capitatum.
Blue dicks. Alliaceae
- Dichondra occidentalis House. Western dichondra. Convolvulaceae
- Digitaria ischaemum (Schreber) Muhlenb. Poaceae
- Digitaria sanguinalis (L.) Scop. Poaceae
- Dimorphotheca sinuata DC. Cape-marigold. Asteraceae
- Diplotaxis tenuifolia (L.) DC. Wall-rocket. Brassicaceae
- Distichlis spicata (L.) E. Greene. Saltgrass. Poaceae
- Dithyrea maritima (A. Davidson) A. Davidson. Beach spectacle-pod.
Brassicaceae
- Dodecatheon clevelandii E. Greene ssp. clevelandii.
Primulaceae
- Dryopteris arguta (Kaulf.) Maxon. Coastal wood fern. Dryopteridaceae
- Dudleya abramsii Rose ssp. parva (Rose & A. Davidson)
J. Bartel. Conejo dudleya. Crassulaceae
- Dudleya blochmaniae (Eastw.) Moran ssp. blochmaniae.
Blochman's dudleya. Crassulaceae
- Dudleya caespitosa (Haworth) Britton & Rose. Crassulaceae
- Dudleya cymosa (Lemaire) Britton & Rose ssp. marcescens
Moran. Marcescent dudleya. Crassulaceae
- Dudleya cymosa (Lemaire) Britton & Rose ssp. ovatifolia
(Britton) Moran. Santa Monica Mountains dudleya. Crassulaceae
- Dudleya lanceolata (Nutt.) Britton & Rose. Crassulaceae
- Dudleya multicaulis (Rose) Moran. Many-stemmed dudleya. Crassulaceae
- Dudleya pulverulenta (Nutt.) Britton & Rose ssp. pulverulenta.
Crassulaceae
- Dudleya verityi K. Nakai. Verity's dudleya. Crassulaceae
- Echinochloa colona (L.) Link. Poaceae
- Echinochloa crus-galli (L.) P. Beauv. Barnyard grass. Poaceae
- Echinodorus berteroi (Sprengel) Fassett. Alismataceae
- Ehrharta erecta Lam. Poaceae
- Elatine californica A. Gray. Elatinaceae
- Eleocharis macrostachya Britton. Cyperaceae
- Eleocharis montevidensis Kunth. Cyperaceae
- Eleocharis radicans (Poiret) Kunth. Cyperaceae
- Elymus glaucus Buckley ssp. glaucus. Blue wildrye.
Poaceae
- Elymus multisetus (J. G. Smith) Burtt Davy. Big squirreltail.
Poaceae
- Elymus stebbinsii Gould. Poaceae
- Emmenanthe penduliflora Benth. Whispering bells. Hydrophyllaceae
- Encelia californica Nutt. Asteraceae
- Epilobium brachycarpum C. Presl. Onagraceae
- Epilobium canum (E. Greene) Raven ssp. canum. California
fuchsia, zauschneria. Onagraceae
- Epilobium ciliatum Raf. ssp. ciliatum. Onagraceae
- Epilobium pygmaeum (Speg.) P. Hoch & Raven. Onagraceae
- Epipactis gigantea Hook. Stream orchid. Orchidaceae
- Equisetum hyemale L. ssp. affine (Engelm.) Calder
& R. H. Taylor. Common scouring rush. Equisetaceae
- Equisetum laevigatum A. Braun. Smooth scouring rush. Equisetaceae
- Equisetum telmateia Ehrh. ssp. braunii (Milde) R.
L. Hauke. Giant horsetail. Equisetaceae
- Eragrostis barrelieri Daveau. Poaceae
- Eragrostis cilianensis (All.) Janchen. Stinkgrass. Poaceae
- Eragrostis hypnoides (Lam.) Britton, Sterns & Pogg. Teal
lovegrass. Poaceae
- Eragrostis mexicana (Hornem.) Link ssp. virescens
(C. Presl.) Koch & E. S½nchez. Poaceae
- Eremocarpus setigerus (Hook.) Benth. Turkey-mullein. Euphorbiaceae
- Eriastrum densifolium (Benth.) H. Mason ssp. elongatum
(Beenth.) H. Mason. Polemoniaceae
- Eriastrum filifolium (Nutt.) Wooton & Standley. Polemoniaceae
- Eriastrum sapphirinum (Eastw.) H. Mason. Polemoniaceae
- Ericameria ericoides (Less.) Jepson. Asteraceae
- Ericameria linearifolia (DC.) Urbatch & J. Wussow. Interior
goldenbush. Asteraceae
- Ericameria palmeri (A. Gray) H. M. Hall var. pachylepis
(H. M. Hall) G. Nesom. Asteraceae
- Ericameria parishii (E. Greene) H. M. Hall var. parishii.
Asteraceae
- Erigeron foliosus Nutt. var. foliosus. Asteraceae
- Eriodictyon crassifolium Benth. var. crassifolium.
Hydrophyllaceae
- Eriogonum cinereum Benth. Polygonaceae
- Eriogonum citharaeforme S. Watson. Polygonaceae
- Eriogonum crocatum A. Davidson. Conejo buckwheat. Polygonaceae
- Eriogonum elongatum Benth. var. elongatum. Polygonaceae
- Eriogonum fasciculatum Benth. var. fasciculatum.
California buckwheat. Polygonaceae
- Eriogonum fasciculatum Benth. var. foliolosum (Nutt.)
Abrams. Polygonaceae
- Eriogonum gracile Benth. var. gracile. Polygonaceae
- Eriogonum parvifolium Smith. Polygonaceae
- Eriogonum wrightii Benth. var. membranaceum Jepson.
Polygonaceae
- Eriophyllum confertiflorum (DC.) A. Gray var. confertiflorum.
Golden-yarrow. Asteraceae
- Erodium botrys (Cav.) Bertol. Geraniaceae
- Erodium brachycarpum (Godron) Thellung. Geraniaceae
- Erodium cicutarium (L.) L'HÚr. Filaree. Geraniaceae
- Erodium macrophyllum Hook. & Arn. Geraniaceae
- Erodium moschatum (L.) L'HÚr. Geraniaceae
- Erysimum capitatum (Douglas) E. Greene ssp. capitatum.
Western wallflower. Brassicaceae
- Erysimum insulare E. Greene ssp. suffrutescens (Abrams)
R. A. Price. Suffrutescent wallflower. Brassicaceae
- Eschscholzia caespitosa Benth. Papaveraceae
- Eschscholzia californica Cham. Papaveraceae
- Eucalyptus globulus Labill. Blue gum. Myrtaceae
- Eucrypta chrysanthemifolia (Benth.) E. Greene var. chrysanthemifolia.
Hydrophyllaceae
- Euphorbia crenulata Engelm. Chinese caps. Euphorbiaceae
- Euphorbia peplus L. Petty spurge. Euphorbiaceae
- Euthamia occidentalis Nutt. Western goldenrod. Asteraceae
- Festuca arundinacea Schreber. Tall fescue. Poaceae
- Festuca elmeri Scribner & Merr. Poaceae
- Festuca pratensis Hudson. Meadow fescue. Poaceae
- Filago californica Nutt. Asteraceae
- Foeniculum vulgare Miller. Fennel. Apiaceae
- Frankenia salina (Molina) I. M. Johnston. Alkali heath. Frankeniaceae
- Fraxinus dipetala Hook. & Arn. California ash. Oleaceae
- Fraxinus velutina Torrey. Velvet ash. Oleaceae
- Fritillaria biflora Lindley. Chocolate lily, mission bells.
Liliaceae
- Galinsoga parviflora Cav. var. parviflora. Asteraceae
- Galium andrewsii A. Gray ssp. andrewsii. Phlox-leaved
bedstraw. Rubiaceae
- Galium angustifolium Nutt. ssp. angustifolium. Narrow-leaved
bedstraw. Rubiaceae
- Galium aparine L. Goose-grass. Rubiaceae
- Galium cliftonsmithii (Dempster) Dempster & Stebb. Santa
Barbara bedstraw. Rubiaceae
- Galium nuttallii A. Gray. San Diego bedstraw. Rubiaceae
- Garrya veatchii Kellogg. Garryaceae
- Gastridium ventricosum (Gouan) Schinz & Thell. Nit grass.
Poaceae
- Geranium carolinianum L. Geraniaceae
- Geranium molle L. Geraniaceae
- Geranium rotundifolium L. Geraniaceae
- Gilia angelensis V. Grant. Polemoniaceae
- Gilia australis (H. Mason & A. D. Grant) V. Grant & A. D.
Grant. Polemoniaceae
- Gilia capitata Sims. ssp. abrotanifolia (E. Greene)
V. Grant. Polemoniaceae
- Githopsis diffusa A. Gray ssp. diffusa. Campanulaceae
- Glycyrrhiza lepidota Pursh. Wild licorice. Fabaceae
- Gnaphalium bicolor Bioletti. Asteraceae
- Gnaphalium californicum DC. Asteraceae
- Gnaphalium canescens DC. ssp. beneolens (Davidson)
Stebb. & Keil. Asteraceae
- Gnaphalium canescens DC. ssp. microcephalum (Nutt.)
Stebb. & Keil. Asteraceae
- Gnaphalium leucocephalum A. Gray. Asteraceae
- Gnaphalium luteo-album L. Asteraceae
- Gnaphalium palustre Nutt. Asteraceae
- Gnaphalium ramosissimum Nutt. Asteraceae
- Gnaphalium stramineum Kunth. Asteraceae
- Grindelia camporum E. Greene var. bracteosum(J.
Howell) M. A. Lane. AsteraceaeM
- Guillenia lasiophylla (Hook. & Arn.) E. Greene. Brassicaceae
- Gutierrezia californica (DC.) Torrey & A. Gray. California
matchweed. Asteraceae
- Hazardia squarrosa (Hook. & Arn.) E. Greene var. grindelioides
(DC.) W. Clark. Saw-toothed goldenbush. Asteraceae
- Hedypnois cretica (L.) Dum.-Cours. Asteraceae
- Helenium puberulum DC. Asteraceae
- Helianthemum scoparium Nutt. Peak rush-rose. Cistaceae
- Helianthus annuus L. Asteraceae
- Helianthus gracilentus A. Gray. Asteraceae
- Heliotropium curassavicum L. Boraginaceae
- Hemizonia fasciculata (DC.) Torrey & A. Gray. Asteraceae
- Hemizonia minthornii Jepson. Santa Susana tarplant. Asteraceae
- Hemizonia pungens (Hook. & Arn.) Torrey & A. Gray. Common
spikeweed. Asteraceae
- Herniaria hirsuta L. ssp. cinerea (DC.) Cout. Caryophyllaceae
- Hesperocnide tenella Torrey. Western nettle. Urticaceae
- Hesperolinon micranthum (A. Gray) Small. Linaceae
- Heteromeles arbutifolia (Lindley) M. Roemer. Toyon. Rosaceae
- Heterotheca grandiflora Nutt. Telegraph weed. Asteraceae
- Heterotheca sessiliflora (Nutt.) Shinn. ssp. fastigiata
(E. Greene) Semple. Asteraceae
- Heterotheca sessiliflora (Nutt.) Shinn. ssp. sessiliflora.
Asteraceae
- Hieracium argutum Nutt. Asteraceae
- Hirschfeldia incana (L.) Lagr.-Fossat. Brassicaceae
- Hoita macrostachya (DC.) Rydb. Fabaceae
- Holodiscus discolor (Pursh) Maxim. Oceanspray. Rosaceae
- Hordeum brachyantherum Nevski ssp. californicum
(Covas & Stebb.) V. Bothmer, N. Jacobsen & O. Seberg. Poaceae
- Hordeum intercedens Nevski. Poaceae
- Hordeum marinum Hudson ssp. gussoneanum (Parl.)
Thellung. Mediterranean barley. Poaceae
- Hordeum murinum L. ssp. glaucum (Steudel) Tzvelev.
Poaceae
- Horkelia cuneata Lindley ssp. cuneata. Rosaceae
- Hydrocotyle moschata Forster f. Apiaceae
- Hydrocotyle umbellata L. Apiaceae
- Hypochaeris glabra L. Smooth cat's-ear. Asteraceae
- Hypochaeris radicata L. Rough cat's-ear. Asteraceae
- Ipomoea purpurea (L.) Roth. Common morning-glory. Convolvulaceae
- Isocoma menziesii (Hook. & Arn.) G. Nelson var. sedoides
(E. Greene) G. Nelson. Asteraceae
- Isocoma menziesii (Hook. & Arn.) G. Nelson var. vernonioides
(Nutt.) G. Nelson. Asteraceae
- Isomeris arborea Nutt. Bladderpod. Capparaceae
- Iva axillaris Pursh ssp. robustior (Hook.) Bassett.
Poverty weed. Asteraceae
- Jaumea carnosa (Less.) A. Gray. Asteraceae
- Juglans californica S. Watson var. californica.
Southern California black walnut. Juglandaceae
- Juncus acutus L. ssp. leopoldii (Parl.) Snog. Juncaceae
- Juncus balticus Willd. Juncaceae
- Juncus bufonius L. Toad rush. Juncaceae
- Juncus macrophyllus Cov. Juncaceae
- Juncus mexicanus Willd. Juncaceae
- Juncus patens E. Meyer. Juncaceae
- Juncus phaeocephalus Engelm. var. paniculatus Engelm.
Juncaceae
- Juncus textilis Buchenau. Juncaceae
- Juncus torreyi Cov. Juncaceae
- Juncus xiphioides E. Meyer. Juncaceae
- Juniperus californica Carri¶re. Cupressaceae
- Keckiella cordifolia (Benth.) Straw. Scrophulariaceae
- Koeleria macrantha (Ledeb.) J. A. Schultes. Junegrass. Poaceae
- Lactuca serriola L. Prickly lettuce. Asteraceae
- Lagophylla ramosissima Nutt. Asteraceae
- Lamarckia aurea (L.) Moench. Goldentop. Poaceae
- Lamium amplexicaule L. Lamiaceae
- Lastarriaea coriacea (Goodman) Hoover. Polygonaceae
- Lasthenia californica Lindley. Asteraceae
- Lasthenia coronaria (Nutt.) Ornduff. Asteraceae
- Lathyrus vestitus Nutt. var. vestitus. Fabaceae
- Lavatera assurgentiflora Kellogg. Malva rosa, island mallow.
Malvaceae
- Layia platyglossa (Fischer & C. Meyer) A. Gray. Tidy-tips.
Asteraceae
- Lemna gibba L. Lemnaceae
- Lemna minor L. Lemnaceae
- Lemna trisulca L. Lemnaceae
- Lepechinia fragrans (E. Greene) Epling. Fragrant pitcher
sage. Lamiaceae
- Lepidium lasiocarpum Torrey & A. Gray var. lasiocarpum.
Brassicaceae
- Lepidium latifolium L. Brassicaceae
- Lepidium latipes Hook. var. latipes. Brassicaceae
- Lepidium nitidum Torrey & A. Gray var. nitidum.
Brassicaceae
- Lepidium oblongum Small. Brassicaceae
- Lepidium virginicum L. var. pubescens (E. Greene)
Thellung. Brassicaceae
- Lepidospartum squamatum (A. Gray) A. Gray. Scale-broom. Asteraceae
- Leptochloa fascicularis (Lam.) A. Gray. Bearded sprangletop.
Poaceae
- Leptochloa uninervia (C. Presl.) A. Hitchc. & Chase. Mexican
sprangletop. Poaceae
- Leptodactylon californicum Hook. & Arn. ssp. californicum.
Prickly phlox. Polemoniaceae
- Lessingia filaginifolia (Hook. & Arn.) M. A. Lane var. filaginifolia.
California aster. Asteraceae
- Lessingia virgata A. Gray. Asteraceae
- Lewisia rediviva Pursh. Bitter root. Portulacaceae
- Leymus condensatus (C. Presl.) A. Lûve. Poaceae
- Leymus triticoides (Buckley) Pilger. Poaceae
- Lilium humboldtii Roezl & Leichtlin ssp. ocellatum
(Kellogg) Thorne. Ocellated lily. Liliaceae
- Limonium californicum (Boiss.) A. A. Heller. Western marsh-rosemary.
Plumbaginaceae
- Limonium perezii (Stapf) Hubb. Plumbaginaceae
- Limonium sinuatum (L.) Miller. Plumbaginaceae
- Linanthus androsaceus (Benth.) E. Greene. Polemoniaceae
- Linanthus dianthiflorus (Benth.) E. Greene. Polemoniaceae
- Linanthus liniflorus (Benth.) E. Greene. Polemoniaceae
- Linaria canadensis (L.) Dum.-Cours. Blue toadflax. Scrophulariaceae
- Linaria pinifolia (Poiret) Thell. Scrophulariaceae
- Linum grandiflorum Desf. Linaceae
- Lithophragma affine A. Gray. Saxifragaceae
- Lobelia dunnii E. Dunn var. serrata (A. Gray) McVaugh.
Campanulaceae
- Lobularia maritima (L.) Desv. Sweet alyssum. Brassicaceae
- Lolium perenne L. Perennial ryegrass. Poaceae
- Lolium temulentum L. Darnel. Poaceae
- Lomatium dasycarpum (Torrey & A. Gray) J. Coulter & Rose
ssp. dasycarpum. Apiaceae
- Lomatium lucidum (Torrey & A. Gray) Jepson. Apiaceae
- Lomatium utriculatum (Torrey & A. Gray) J. Coulter & Rose.
Apiaceae
- Lonicera hispidula Douglas var. vacillans A. Gray.
Caprifoliaceae
- Lonicera subspicata Hook. & Arn. var. denudata Rehder.
Caprifoliaceae
- Lotus argophyllus (A. Gray) E. Greene var. argophyllus.
Fabaceae
- Lotus corniculatus L. Birdfoot trefoil. Fabaceae
- Lotus grandiflorus (Benth.) E. Greene. Fabaceae
- Lotus hamatus E. Greene. Fabaceae
- Lotus micranthus Benth. Fabaceae
- Lotus oblongifolius (Benth.) E. Greene var. oblongifolius.
Fabaceae
- Lotus purshianus (Benth.) Clements & E. G. Clements var.
purshianus. Fabaceae
- Lotus salsuginosus E. Greene. Fabaceae
- Lotus scoparius (Nutt.) Ottley var. scoparius. California
broom, deerbush. Fabaceae
- Lotus strigosus (Nutt.) Greene. Fabaceae
- Lotus wrangelianus Fischer & C. Meyer. Fabaceae
- Ludwigia peploides (Kunth) Raven ssp. peploides.
Onagraceae
- Lupinus bicolor Lindley. Miniature lupine. Fabaceae
- Lupinus chamissonis Eschsch. Fabaceae
- Lupinus concinnus J. Agardh. Bajada lupine. Fabaceae
- Lupinus formosus E. Greene var. formosus. Fabaceae
- Lupinus hirsutissimus Benth. Stinging lupine. Fabaceae
- Lupinus latifolius J. Agardh. var. latifolius. Fabaceae
- Lupinus longifolius (S. Watson) Abrams. Fabaceae
- Lupinus microcarpus Sims var. microcarpus. Chick
lupine. Fabaceae
- Lupinus nanus Benth. Fabaceae
- Lupinus sparsiflorus Benth. Coulter's lupine. Fabaceae
- Lupinus succulentus Koch. Arroyo lupine. Fabaceae
- Lupinus truncatus Hook. & Arn. Fabaceae
- Lycium californicum Nutt. Solanaceae
- Lycopersicon esculentum L. Tomato. Solanaceae
- Lythrum californicum Torrey & A. Gray. California loosestrife.
Lythraceae
- Lythrum hyssopifolium L. Lythraceae
- Madia elegans Lindley ssp. elegans. Common madia.
Asteraceae
- Madia exigua (Smith) A. Gray. Threadstem madia. Asteraceae
- Madia gracilis (Smith) Keck. Slender tarweed. Asteraceae
- Malacothamnus fasciculatus (Torrey & A. Gray) E. Greene.
Chaparral mallow. Malvaceae
- Malacothrix clevelandii A. Gray. Asteraceae
- Malacothrix saxatilis (Nutt.) Torrey & A. Gray var. tenuifolia
(Nutt.) A. Gray. Asteraceae
- Malephora crocea (Jacq.) Schwantes. Aizoaceae
- Malosma laurina (Nutt.) Abrams. Laurel sumac. Anacardiaceae
- Malva nicaeensis All. Bull mallow. Malvaceae
- Malva parviflora L. Cheeseweed, little mallow. Malvaceae
- Malvella leprosa (Ortega) Hrapov. Alkali-mallow, whiteweed.
Malvaceae
- Marah macrocarpus (E. Greene) E. Greene. Cucurbitaceae
- Marrubium vulgare L. Horehound. Lamiaceae
- Matthiola incana (L.) R. Br. Stock. Brassicaceae
- Meconella denticulata E. Greene. Papaveraceae
- Medicago lupulina L. Black medick, yellow trefoil. Fabaceae
- Medicago polymorpha L. California burclover. Fabaceae
- Medicago sativa L. Alfalfa, lucerne. Fabaceae
- Melica imperfecta Trin. Poaceae
- Melilotus alba Medikus. White sweetclover. Fabaceae
- Melilotus indica (L.) All. Sourclover. Fabaceae
- Mentha arvensis L. Lamiaceae
- Mentha pulegium L. Pennyroyal. Lamiaceae
- Mentha spicata L. var. spicata. Spearmint. Lamiaceae
- Mentzelia micrantha (Hook. & Arn.) Torrey & A. Gray. Loasaceae
- Mesembryanthemum crystallinum L. Crystalline iceplant. Aizoaceae
- Mesembryanthemum nodiflorum L. Slender-leaved iceplant. Aizoaceae
- Micropus californicus Fischer & C. Meyer. Slender cottonweed.
Asteraceae
- Microseris douglasii (DC.) Schultz-Bip. ssp. douglasii.
Asteraceae
- Microseris douglasii (DC.) Schultz-Bip. ssp. tenella
(A. Gray) Chambers. Asteraceae
- Microseris elegans A. Gray. Asteraceae
- Mimulus aurantiacus Curtis. Diplacus, bush monkey flower.
Scrophulariaceae
- Mimulus brevipes Benth. Scrophulariaceae
- Mimulus cardinalis Benth. Scrophulariaceae
- Mimulus floribundus Lindley. Scrophulariaceae
- Mimulus guttatus DC. Scrophulariaceae
- Mimulus pilosus (Benth.) S. Watson. Scrophulariaceae
- Minuartia douglasii (Torrey & A. Gray) Mattf. Caryophyllaceae
- Mirabilis californica A. Gray. Wishbone bush. Nyctaginaceae
- Modiola caroliniana (L.) G. Don. Malvaceae
- Monanthochloe littoralis Engelm. Poaceae
- Monardella hypoleuca A. Gray. Lamiaceae
- Monardella lanceolata A. Gray. Mustang mint. Lamiaceae
- Monolopia lanceolata Nutt. Asteraceae
- Mucronea californica Benth. California spineflower. Polygonaceae
- Muhlenbergia microsperma (DC.) Kunth. Littleseed muhly. Poaceae
- Muhlenbergia rigens (Benth.) A. Hitchc. Deergrass. Poaceae
- Myrica californica Cham. & Schldt. California wax myrtle.
Myricaceae
- Najas flexilis (Willd.) Rostkov & Schmidt. Slender water-nymph.
Hydrocharitaceae
- Nama stenocarpum A. Gray. Hydrophyllaceae
- Nassella cernua (Stebb. & Lûve) Barkworth. Nodding needlegrass.
Poaceae
- Nassella lepida (A. Hitchc.) Barkworth. Foothill needlegrass.
Poaceae
- Nassella pulchra (A. Hitchc.) Barkworth. Purple needlegrass.
Poaceae
- Navarretia hamata E. Greene ssp. hamata. Polemoniaceae
- Navarretia pubescens (Benth.) Hook. & Arn. Polemoniaceae
- Nemacladus ramosissimus Nutt. Campanulaceae
- Nemophila menziesii Hook. & Arn. var. integrifolia
Parish. Baby blue-eyes. Hydrophyllaceae
- Nemophila menziesii Hook. & Arn. var. menziesii.
Baby blue-eyes. Hydrophyllaceae
- Nemophila pedunculata Benth. Hydrophyllaceae
- Nicotiana glauca Graham. Tree tobacco. Solanaceae
- Nicotiana quadrivalvis Pursh. Solanaceae
- Notholaena californica D. C. Eaton. Pteridaceae
- Nuphar luteum (L.) Sibthorp & Sm. ssp. polysepalum
(Engelm.) E. O. Beal. Cow-lily, pond-lily. Nymphaeaceae
- Oenanthe sarmentosa J. S. Presl. Dropwort. Apiaceae
- Oenothera californica (S. Watson) S. Watson ssp. californica.
Onagraceae
- Oenothera elata Kunth ssp. hirsutissima (S. Watson)
W. Dietr. Onagraceae
- Oligomeris linifolia (M. Vahl) J. F. Macbr. Resedaceae
- Opuntia ficus-indica (L.) Miller. Indian-fig. Cactaceae
- Opuntia littoralis (Engelm.) Cockerell. Cactaceae
- Opuntia x occidentalis Engelm. Cactaceae
- Opuntia prolifera Engelm. Cactaceae
- Orobanche bulbosa G. Beck. Orobanchaceae
- Orobanche californica Cham. & Schlecht ssp. grandis
Heckard. Orobanchaceae
- Orobanche fasciculata Nutt. Clustered broomrape. Orobanchaceae
- Orobanche uniflora L. Naked broomrape. Orobanchaceae
- Orobanche vallicola (Jepson) Heckard. Orobanchaceae
- Osmorhiza brachypoda Torrey. Sweet-cleely. Apiaceae
- Osteospermum ecklonis (DC.) Norlindh. Trailing African daisy.
Asteraceae
- Oxalis albicans Kunth ssp. californica (Abrams)
Eiten. Oxalidaceae
- Oxalis corniculata L. Oxalidaceae
- Oxalis pes-caprae L. Bermuda buttercup. Oxalidaceae
- Oxalis rubra A. St. Hil. Oxalidaceae
- Paeonia californica Torrey & A. Gray. Paeoniaceae
- Panicum capillare L. Witch grass. Poaceae
- Panicum miliaceum L. Broom corn millet. Poaceae
- Papaver californicum A. Gray. Fire poppy. Papaveraceae
- Parapholis incurva (L.) C. E. Hubb. Sickle grass. Poaceae
- Parietaria hespera B. D. Hinton. Urticaceae
- Paspalum dilatatum Poiret. Dallis grass. Poaceae
- Paspalum distichum L. Knotgrass. Poaceae
- Pectocarya linearis (Ruiz L÷pez & Pavon) DC. ssp. ferocula
(I. M. Johnston) Thorne. Boraginaceae
- Pectocarya penicillata (Hook. & Arn.) A. DC. Boraginaceae
- Pedicularis densiflora Hook. Indian warrior. Scrophulariaceae
- Pellaea andromedifolia (Kaulf.) NÚe. Coffee fern. Pteridaceae
- Pellaea mucronata (D. Eaton) D. Eaton var. mucronata.
Bird's-foot fern. Pteridaceae
- Pennisetum cladestinum Chiov. Kikuyu grass. Poaceae
- Pennisetum setaceum Forsskal. Poaceae
- Penstemon centranthifolius (Benth.) Benth. Scrophulariaceae
- Penstemon heterophyllus Lindley var. australis Munz
& I. M. Johnston. Scrophulariaceae
- Penstemon x parishii A. Gray. Scrophulariaceae
- Penstemon spectabilis Thurber var. subviscosus (Keck)
McMinn. Scrophulariaceae
- Pentachaeta lyonii A. Gray. Lyon's pentachaeta. Asteraceae
- Pentagramma triangularis (Kaulf.) G. Yatskievych, M. D. Windham
& E. Wollenweber ssp. triangularis. Goldback fern. Pteridaceae
- Perityle emoryi Torrey. Asteraceae
- Petunia parviflora A. L. Juss. Solanaceae
- Phacelia brachyloba (Benth.) A. Gray. Hydrophyllaceae
- Phacelia cicutaria E. Greene var. hispida (A. Gray)
J. T. Howell. Hydrophyllaceae
- Phacelia distans Benth. Hydrophyllaceae
- Phacelia douglasii (Benth.) Torrey. Hydrophyllaceae
- Phacelia egena (Benth.) J. T. Howell. Hydrophyllaceae
- Phacelia grandiflora (Benth.) A. Gray. Hydrophyllaceae
- Phacelia imbricata E. Greene. Hydrophyllaceae
- Phacelia longipes A. Gray. Hydrophyllaceae
- Phacelia minor (Harvey) Thell. Hydrophyllaceae
- Phacelia parryi Torrey. Hydrophyllaceae
- Phacelia ramosissima Lehm. Hydrophyllaceae
- Phacelia tanacetifolia Benth. Hydrophyllaceae
- Phacelia viscida (Benth.) Torrey. Hydrophyllaceae
- Phalaris aquatica L. Harding grass. Poaceae
- Phalaris canariensis L. Canary grass. Poaceae
- Phalaris minor Retz. Poaceae
- Phalaris paradoxa L. Poaceae
- Phlox gracilis E. Greene. Polemoniaceae
- Pholisma arenarium Hook. Lennoaceae
- Pholistoma auritum (Lindley) Lilja var. auritum.
Fiesta flower. Hydrophyllaceae
- Pholistoma racemosum (Nutt.) Constance. Hydrophyllaceae
- Phoradendron macrophyllum (Engelm.) Cockerell. Big-leaf mistletoe.
Viscaceae
- Phoradendron villosum (Nutt.) Nutt. Oak mistletoe. Viscaceae
- Phragmites australis (Cav.) Steudel. Common reed. Poaceae
- Phyla lanceolata (Michaux) E. Greene. Verbenaceae
- Phyla nodiflora (L.) E. Greene var. nodiflora
- Phyllospadix scouleri Hook. Surf-grass. Zosteraceae
- Phyllospadix torreyi S. Watson. Surf-grass. Zosteraceae
- Pickeringia montana Nutt. var. montana. Chaparral
pea. Fabaceae
- Picris echioides L. Bristly ox-tongue. Asteraceae
- Piperia unalascensis (Sprengel) Rydb. Orchidaceae
- Piptatherum miliaceum (L.) Cosson. Smilo grass. Poaceae
- Plagiobothrys acanthocarpus (Piper) I. M. Johnston. Adobe
allocarya. Boraginaceae
- Plagiobothrys canescens Benth. Boraginaceae
- Plagiobothrys nothofulvus (A. Gray) A. Gray. Popcornflower.
Boraginaceae
- Plantago erecta E. Morris. California plantain. Plantaginaceae
- Plantago lanceolata L. English plantain. Plantaginaceae
- Plantago major L. Common plantain. Plantaginaceae
- Platanus racemosa Nutt. Western sycamore, aliso. Platanaceae
- Platystemon californicus Benth. Cream cups. Papaveraceae
- Plectritis ciliosa (E. Greene) Jepson ssp. insignis
(Suksd.) D. Morey. Valerianaceae
- Pluchea odorata (L.) Cass. var. odorata. Salt marsh-fleabane.
Asteraceae
- Poa annua L. Annual bluegrass. Poaceae
- Poa palustris L. Fowl bluegrass. Poaceae
- Poa secunda J. S. Presl. ssp. secunda. One-sided
bluegrass. Poaceae
- Polycarpon depressum Nutt. Caryophyllaceae
- Polycarpon tetraphyllum (L.) L. Caryophyllaceae
- Polygala cornuta Kellogg var. fishiae (C. Parry)
Jepson. Fish's milkwort. Polygalaceae
- Polygonum amphibium L. var. emersum Michaux. Kelp.
Polygonaceae
- Polygonum arenastrum Boreau. Common knotweed, doorweed. Polygonaceae
- Polygonum argyrocoleon Kunze. Polygonaceae
- Polygonum hydropiperoides Michaux. Waterpeppers. Polygonaceae
- Polygonum lapathifolium L. Willow weed. Polgonaceae
- Polygonum punctatum Elliott. Water smartweed. Polygonaceae
- Polypodium californicum Kaulf. California polypody. Polypodiaceae
- Polypogon interruptus Kunth. Ditch beard grass. Poaceae
- Polypogon monspeliensis (L.) Desf. Poaceae
- Populus balsamifera L. ssp. trichocarpa (Torrey
& A. Gray) Brayshaw. Black cottonwood. Salicaceae
- Populus fremontii S. Watson ssp. fremontii. Fremont
cottonwood. Salicaceae
- Portulaca oleracea L. Common purslane. Portulacaceae
- Potamogeton crispus L. Crispate-leaved pondweed. Potamogetonaceae
- Potamogeton pectinatus L. Fennel-leaved pondweed. Potamogetonaceae
- Potentilla anserina L. ssp. pacifica (Howell) Rousi.
Rosaceae
- Potentilla glandulosa Lindley ssp. glandulosa. Rosaceae
- Proboscidea louisianica (Miller) Thell. ssp. louisianica.
Common unicorn plant. Martyniaceae
- Prunus ilicifolia (Nutt.) Walp. ssp. ilicifolia.
Holly-leaved cherry, islay. Rosaceae
- Psilocarphus tenellus Nutt. var. tenellus. Asteraceae
- Pteridium aquilinum (L.) Kuhn var. pubescens L.
Underw. Dennstaedtiaceae
- Pterostegia drymarioides Fischer & C. Meyer. Polygonaceae
- Quercus agrifolia Nee. Coast live oak. Fagaceae
- Quercus berberidifolia Liebm. Scrub oak. Fagaceae
- Quercus lobata Nee. Valley oak, roble. Fagaceae
- Quercus wislizenii A. DC. var. wislizenii. Interior
live oak. Fagaceae
- Rafinesquia californica Nutt. California chicory. Asteraceae
- Ranunculus californicus Benth. Ranunculaceae
- Ranunculus cymbalaria Pursh. ssp. saximontanus Fern.
Ranunculaceae
- Ranunculus hebecarpus Hook & Arn. Ranunculaceae
- Ranunculus repens L. Ranunculaceae
- Raphanus raphanistrum L. Jointed charlock. Brassicaceae
- Raphanus sativus L. Radish. Brassicaceae
- Rhamnus californica ssp. californica Eschsch. California
coffeeberry. Rhamnaceae
- Rhamnus crocea Nutt. Spiny redberry, buckthorn. Rhamnaceae
- Rhamnus ilicifolia Kellogg. Holly-leaf redberry, holly-leaf
buckthorn. Rhamnaceae
- Rhus integrifolia (Nutt.) Brewer & S. Watson. Lemonadeberry.
Anacardiaceae
- Rhus ovata S. Watson. Sugar bush. Anacardiaceae
- Rhus trilobata Torrey & A. Gray. Skunkbrush, squaw bush.
Anacardiaceae
- Ribes aureum Pursh var. gracillimum (Cov. & Britton)
Jepson. Golden current. Grossulariaceae
- Ribes californicum Hook. & Arn. var. hesperium (McClatchie)
Jepson. Hillside gooseberry. Grossulariaceae
- Ribes indecorum Eas. White-flowered currant. Grossulaceae
- Ribes malvaceum Small var. viridifolium Abrams.
Chaparral currant. Grossulariaceae
- Ribes speciosum Pursh. Fuchsia-flowered gooseberry. Grossulariaceae
- Ricinus communis L. Castor bean. Euphorbiaceae
- Robinia pseudoacacia L. Black locust. Fabaceae
- Romneya coulteri Harvey. Coulter's matilija poppy. Papaveraceae
- Rorippa curvisiliqua (Hook.) Britton. Brassicaceae
- Rorippa nasturtium-aquaticum (L.) Hayek. Water cress. Brassicaceae
- Rosa californica Cham. & Schldl. California rose. Rosaceae
- Rubus discolor Weihe & Nees. Himalayan blackberry. Rosaceae
- Rubus ursinus Cham. & Schldl. California blackberry. Rosaceae
- Rumex acetosella L. Sheep sorrel. Polygonaceae
- Rumex conglomeratus Murray. Polygonaceae
- Rumex crispus L. Curly dock. Polygonaceae
- Rumex kerneri Borbas. Polygonceae
- Rumex maritimus L. Golden dock. Polygonaceae
- Rumex salicifolius J. A. Weinm. var. crassus (Rech.
f.) J. Howell. Polygonaceae
- Rumex salicifolius J. A. Weinm. var. salicifolius.
Willow dock. Polygonaceae
- Rupertia physodes (Hook.) Grimes. Fabaceae
- Ruppia maritima L. Ditch-grass. Potamogetonaceae
- Ruta chalepensis L. Rutaceae
- Salicornia bigelovii Torrey. Chenopodiaceae
- Salicornia europaea L. Chenopodiaceae
- Salicornia subterminalis Parish. Chenopodiaceae
- Salicornia virginica L. Chenopodiaceae
- Salix exigua Nutt. Narrow-leaved willow. Salicaceae
- Salix laevigata Bebb. Red willow. Salicaceae
- Salix lasiolepis Benth. Arroyo willow. Salicaceae
- Salix lucida Muhlenb. ssp. lasiandra (Benth.) E.
Murray. Salicaceae
- Salpichroa origanifolia (Lam.) Baillon. Solanaceae
- Salsola tragus L. Russian thistle, tumbleweed. Chenopodiaceae
- Salvia apiana Jepson. White sage. Lamiaceae
- Salvia columbariae Benth. Chia. Lamiaceae
- Salvia leucophylla E. Greene. Lamiaceae
- Salvia mellifera E. Greene. Black sage. Lamiaceae
- Salvia spathacea E. Greene. Pitcher sage. Lamiaceae
- Sambucus mexicana C. Presl. Blue elderberry. Caprifoliaceae
- Samolus parviflorus Raf. Water-pimpernel, brookweed. Primulaceae
- Sanguisorba minor Scop. ssp. muricata Briq. Garden
burnet. Rosaceae
- Sanicula arguta J. Coulter & Rose. Apiaceae
- Sanicula bipinnata Hook. & Arn. Poison sanicle. Apiaceae
- Sanicula crassicaulis DC. Apiaceae
- Sanicula tuberosa Torrey. Apiaceae
- Satureja douglasii (Benth.) Briq. Verba buena. Lamiaceae
- Saxifraga californica E. Greene. Saxifragaceae
- Scandix pecten-veneris L. Venus' needle, shepherd's needle.
Apiaceae
- Schinus molle L. Peruvian pepper tree. Anacardiaceae
- Schismus barbatus (L.) Thellung. Poaceae
- Scirpus acutus Bigelow var. occidentalis (S. Watson)
Beetle. Common tule. Cyperaceae
- Scirpus americanus Pers. Cyperaceae
- Scirpus californicus (C. Meyer) Steudel. Cyperaceae
- Scirpus cernuus Vahl. Cyperaceae
- Scirpus maritimus L. Cyperaceae
- Scirpus microcarpus C. Presl. Cyperaceae
- Scrophularia californica Cham. & Schlecht ssp. californica.
California figwort. Scrophulariaceae
- Scutellaria tuberosa Benth. Lamiaceae
- Sedum spathulifolium Hook. Crassulaceae
- Selaginella bigelovii L. Underwood. Selaginellaceae
- Senecio aphanactis E. Greene. Asteraceae
- Senecio breweri Burtt Davy. Asteraceae
- Senecio californicus DC. Asteraceae
- Senecio flaccidus Less. var. douglasii (DC.) B.
Turner & T. Barkley. Asteraceae
- Senecio mikanioides Walp. German-ivy. Asteraceae
- Senecio vulgaris L. Common groundsel. Asteraceae
- Setaria gracilis Kunth. Poaceae
- Setaria pumila (Poiret) Roemer & Schultes. Poaceae
- Sherardia arvensis L. Field madder. Rubiaceae
- Sidalcea malvaeflora (DC.) Benth. ssp. sparsifolia
C. Hitchc. Checker mallow. Malvaceae
- Silene antirrhina L. Caryophyllaceae
- Silene gallica L. Caryophyllaceae
- Silene laciniata Cav. ssp. major C. Hitchc. & Maguire.
Caryophyllaceae
- Silene multinervia S. Watson. Caryophyllaceae
- Silene verecunda S. Watson ssp. platyota (S. Watson)
C. Hitchc. & Maguire. Caryophyllaceae
- Silybum marianum (L.) Gaertner. Milk thistle. Asteraceae
- Sinapsis arvensis L. Charlock. Brassicaceae
- Sisymbrium altissimum L. Tumble mustard. Brassicaceae
- Sisymbrium irio L. London rocket. Brassicaceae
- Sisymbrium officinale L. Hedge mustard. Brassicaceae
- Sisymbrium orientale L. Brassicaceae
- Sisyrinchium bellum S. Watson. Blue-eyed-grass. Iridaceae
- Solanum americanum Miller. Solanaceae
- Solanum douglasii Dunal. Solanaceae
- Solanum elaeagnifolium Cav. White horse-nettle, silverleaf-nettle.
Solanaceae
- Solanum rostratum Dunal. Buffalo berry. Solanaceae
- Solanum sarrachoides Sendtner. Solanaceae
- Solanum xanti A. Gray. Solanaceae
- Soleirolia soleirolii (Req.) Dandy. Baby's tears. Urticaceae
- Solidago californica Nutt. California goldenrod. Asteraceae
- Soliva sessilis Ruiz L÷pez & Pavon. Asteraceae
- Sonchus asper (L.) Hill. Prickly sow thistle. Asteraceae
- Sonchus oleraceus L. Common sow thistle. Asteraceae
- Sorghum halepense (L.) Pers. Johnsongrass. Poaceae
- Spartium junceum L. Spanish broom. Fabaceae
- Spergula arvensis L. Stickwort, starwort. Caryophyllaceae
- Spergularia bocconii (Scheele) Merino. Caryophyllaceae
- Spergularia macrotheca (Hornem.) Heynh. var. macrotheca.
Caryophyllaceae
- Spergularia marina (L.) Griseb. Caryophyllaceae
- Sporobolus indicus (L.) R. Br. Smutgrass. Poaceae
- Stachys ajugoides Benth. var. rigida Jepson & Hoover.
Lamiaceae
- Stachys albens A. Gray. Lamiaceae
- Stachys bullata Benth. Lamiaceae
- Stanleya pinnata (Pursh) Britton var. pinnata. Prince's
plume. Brassicaceae
- Stebbinsoseris heterocarpa (Nutt.) Chambers. Asteraceae
- Stellaria media (L.) Villars. Common chickweed. Caryophyllaceae
- Stellaria nitens Nutt. Shining chickweed. Caryophyllaceae
- Stenotaphrum secundatum (Walter) Kuntze. Saint Augustine
grass. Poaceae
- Stephanomeria cichoriacea A. Gray. Asteraceae
- Stephanomeria diegensis Gottlieb. Asteraceae
- Stephanomeria exigua Nutt. ssp. coronaria (E. Greene)
Gottlieb. Asteraceae
- Stephanomeria virgata Benth. ssp. pleurocarpa (E.
Greene) Gottlieb. Asteraceae
- Stephanomeria virgata Benth. ssp. virgata . Asteraceae
- Stylocline gnaphaloides Nutt. Everlasting nest straw. Asteraceae
- Stylomecon heterophylla (Benth.) G. C. Taylor. Wind poppy.
Papaveraceae
- Suaeda calceoliformis (Hook.) Moquin. Horned sea-blite. Chenopodiaceae
- Suaeda californica S. Watson. California sea-blite. Chenopodiaceae
- Suaeda esteroa W. Ferren & S. Whitmore. Estuary sea-blite.
Chenopodiaceae
- Symphoricarpos mollis Nutt. Creeping snowberry, trip vine.
Caprifoliaceae
- Tamarix ramosissima Ledeb. Tamarisk, saltcedar. Tamaricaceae
- Taraxacum officinale Wiggens. Dandelion. Asteraceae
- Tauschia arguta (Torrey & A. Gray) J. F. Macbr. Apiaceae
- Tauschia hartwegii (A. Gray) J. F. Macbr. Apiaceae
- Tetragonia tetragonioides (Pallas) Kuntze. New Zealand spinach.
Aizoaceae
- Thalictrum fendleri A. Gray var. polycarpum Torrey.
Ranunculaceae
- Thelypteris puberula (Baker) C. Morton var. sonorensis
A. Reed Smith. Thelypteridaceae
- Thysanocarpus curvipes Hook. Brassicaceae
- Thysanocarpus laciniatus Torrey & A. Gray. Brassicaceae
- Torilis nodosa (L.) Gaertner. Apiaceae
- Toxicodendron diversilobum (Torrey & A. Gray) E. Greene.
Poison oak, poison ivy. Anacardiaceae
- Tragopogon porrifolius L. Oyster plant, salsify. Asteraceae
- Tribulus terrestris L. Puncture vine. Zygophyllaceae
- Trichostema lanatum Benth. Woolly bluecurls. Lamiaceae
- Trichostema lanceolatum Benth. Vinegar weed. Lamiaceae
- Trifolium albopurpureum Torrey & A. Gray var. albopurpureum.
Fabaceae
- Trifolium ciliolatum Benth. Fabaceae
- Trifolium depauperatum Desv. Fabaceae
- Trifolium fucatum Lindley. Fabaceae
- Trifolium gracilentum Torrey & A. Gray var. gracilentum.
Fabaceae
- Trifolium hirtum All. Rose clover. Fabaceae
- Trifolium incarnatum L. Crimson clover. Fabaceae
- Trifolium microcephalum Pursh. Fabaceae
- Trifolium obtusiflorum Hook. & Arn. Fabaceae
- Trifolium repens L. White clover. Fabaceae
- Trifolium variegatum Nutt. Fabaceae
- Trifolium willdenovii Sprengel. Tomcat clover. Fabaceae
- Triglochin concinna Burtt Davy var. concinna. Arrow-grass.
Juncaginaceae
- Triticum aestivum L. Wheat. Poaceae
- Tropaeolum majus L. Garden nasturtium. Tropaeolaceae
- Tropidocarpum gracile Hook. Brassicaceae
- Typha domingensis Pers. Southern cattail. Typhaceae
- Typha latifolia L. Soft-flag, broad-leaved cattail. Typhaceae
- Umbellularia californica (Hook. & Arn.) Nutt. California
bay, California laurel. Lauraceae
- Uropappus lindleyi (DC.) Nutt. Silver puffs. Asteraceae
- Urtica dioica L. ssp. holosericea (Nutt.) Thorne.
Hoary nettle. Urticaceae
- Urtica urens L. Dwarf nettle. Urticaceae
- Venegasia carpesioides DC. Canyon-sunflower. Asteraceae
- Verbena lasiostachys Link var. lasiostachys. Verbenaceae
- Verbena lasiostachys Link var. scabrida Moldenke.
Verbenaceae
- Verbesina encelioides (Cav.) A. Gray ssp. exauriculata
(Robinson & Greenman) J. R. Coleman. Golden crownbeard. Asteraceae
- Veronica anagallis-aquatica L. Water speedwell. Scrophulariaceae
- Veronica persica Poiret. Persian speedwell. Scrophulariaceae
- Vicia americana Willd. var. americana. American
vetch. Fabaceae
- Vicia ludoviciana Nutt. var. ludoviciana. Fabaceae
- Vicia sativa L. ssp. sativa. Common vetch, spring
vetch. Fabaceae
- Vicia villosa Roth ssp. varia (Host) Corbi¶re. Fabaceae
- Vicia villosa Roth ssp. villosa. Hairy vetch, winter
vetch. Fabaceae
- Viola pedunculata Torrey & A. Gray. Johnny jump-up, wild
pansy. Violaceae
- Vitis girdiana Munson. Desert wild grape. Vitaceae
- Vinca major L. Greater periwinkle. Apocynaceae
- Vulpia microstachys (Nutt.) Benth. var. ciliata
(Beal) Lonard & Gould. Poaceae
- Vulpia microstachys (Nutt.) Benth. var. pauciflora
(Beal) Lonard & Gould. Poaceae
- Vulpia myuros (L.) C. Gmelin var. hirsuta (Hackel)
Asch. & Graebner. Poaceae
- Vulpia myuros (L.) C. Gmelin var. myuros. Poaceae
- Vulpia octoflora (Walter) Rydb. var. octoflora.
Poaceae
- Wigandia kunthii Choisy. Hydrophyllaceae
- Wolfiella lingulata (Hegelm.) Hegelm. Mud-midget. Lemnaceae
- Woodwardia fimbriata (L.) Smith. Giant chain fern. Blechnaceae
- Xanthium spinosum L. Spiny cocklebur. Asteraceae
- Xanthium strumarium L. Cocklebur. Asteraceae
- Yabea microcarpa (Hook. & Arn.) Koso-Polj. Apiaceae
- Yucca whipplei Torrey ssp. intermedia A. L. Haines.
Agavaceae
- Zannichellia palustris L. Horned-pondweed, grass-wrack. Zannichelliaceae
- Zigadenus fremontii (Torrey) S. Watson. Star-lily. Melanthiaceae
- Zostera marina L. Eel-grass. Zosteraceae
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