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Sonchus arvensis

Family: asteraceae
Common name(s): Perennial Sow Thistle
Hardiness ratings: USDA zone 4 - 9

General resources

• Wikipedia. Online encyclopedia entry (if defined).
• Google images. Web search for photographs.
• The Plant List. Taxonomical lookup
• Catalogue of Life. Taxonomical lookup

Links for Sonchus arvensis

• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 4-9) (9 photos)
• Garden.org - Community-assembled plant profile (1 photo)
• Missouri Plants - Description and photographs of botanical features, with notes about habitat and native status. (14 photos)
• Turner Photographics - Profile of wildflower of the US Pacific Northwest, with botanical description, habitat and distribution, and photo gallery.

Sonchus arvensis glabrescens

Common name(s): Perennial Sowthistle

Links

• Illinois Wildflowers - Informative illustrated page with description and cultivation details, also covering range and faunal associations. (2 photos)

Sonchus arvensis subsp. uliginosus

Links

• Southwest Colorado Wildflowers - Photos and botanical information about the species/genus. (5 photos)