|Scientific Name||Sonchus oleraceus||USDA PLANTS Symbol||SOOL|
|>Common Name||Common Sow-thistle||ITIS Taxonomic Serial No.||38427|
|Description||Habitat: Most soils and habitats, including cultivated gardens, streets, parking areas, and disturbed areas; native to Eurasia but found almost everywhere in North America; images below came from plants growing in sandy soil next to the Rio Grande in Big Bend.
Plant: Erect annual or biennial 4 inches to almost 5 ft. tall; solitary stems branched above near the inflorescence and full of latex.
Leaves: Lower leaves are pinnatifid with deep triangular lobes, dentate margins with soft prickles; upper are alternate, clasping and generally entire or with shallow lobes; upper surfaces dull green and hairless.
Inflorescence: Tight clusters of flower heads resembling dandelions at the top of the stem and arising from leaf axils, each 3/4 to 1-1/4 inches across; many yellow (or whitish) rays but no disk florets; blooming early in the day and closing by noon.
Bloom Period: All year.
References: SEINet, Illinois Wildflowers and Minnesota Wildflowers.
|BONAP Distribution Map
Map Color Key
Banner photo of Lupinus ssp. by Rick Capozza, Austin TX
© Tom Lebsack 2023