Delaware Wildflowers • Scientific names
Sonchus asper
Spiny-leaf SowthistleAsteraceae — Aster family
Non-native
![Sonchus asper](/images/030625_052819.jpg)
![Sonchus asper](/images/030625_052923.jpg)
June 2003
![Sonchus asper](/images/sonchus_asper_3.jpg)
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.
![Sonchus asper](/images/sonchus_asper_4.jpg)
![Sonchus asper](/images/sonchus_asper_5.jpg)
![Sonchus asper](/images/sonchus_asper_6.jpg)
![Sonchus asper](/images/sonchus_asper_7.jpg)
![Sonchus asper](/images/sonchus_asper_8.jpg)
White Clay Creek State Park -- Possum Hill
May 2020
![Sonchus asper](/images/sonchus_asper_9.jpg)
A more typical plant, for me, growing in a pavement crack.
July 2020
Guide to Sonchus of Delaware
Search Google • Delaware • USDA
Photos copyright David G. Smith
Information from the Delaware Flora Checklist used with author's permission.