Delaware Wildflowers • Common names

Spiny-leaf Sowthistle
Sonchus asper
Asteraceae — Aster family
Non-native
Spiny-leaf Sowthistle
Spiny-leaf Sowthistle
June 2003
Spiny-leaf Sowthistle
A large plant, over 4' (1.2m) tall. References say this is an annual that blooms July - October. This one was blooming in May after a very mild winter; I wonder if it was in its second year.

Spiny-leaf Sowthistle
Spiny-leaf Sowthistle
Spiny-leaf Sowthistle
Spiny-leaf Sowthistle
Spiny-leaf Sowthistle
White Clay Creek State Park -- Possum Hill
May 2020
Spiny-leaf Sowthistle
A more typical plant, for me, growing in a pavement crack.

July 2020

Guide to Sonchus of Delaware

Search GoogleDelawareUSDA

Photos copyright David G. Smith

Information from the Delaware Flora Checklist used with author's permission.

Delaware Wildflowers main page