Sow thistle, Sonchus oleraceus (Family Asteraceae), is a common annual weed that has a taproot system, consisting of a large central root that formed directly from the radicle within the seed and a set of much thinner lateral or secondary roots.
Sow thistle, Sonchus oleraceus (Family Asteraceae), is a common annual weed that has a taproot system, consisting of a large central root that formed directly from the radicle within the seed and a set of much thinner lateral or secondary roots.