Delaware Wildflowers • Months

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

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Photos copyright David G. Smith

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