prickly sowthistle sonchus asper

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Prickly or Spiny Sowthistle - Sonchus asper,Norfolk, England, UK Royalty Free Stock Photo

close up of Sonchus asper, also commonly known as the prickly sow-thistle, rough milk thistle, spiny sowthistle, sharp Royalty Free Stock Photo

Sonchus asper, also commonly known as the prickly sow-thistle, rough milk thistle, spiny sowthistle, sharp-fringed sow, or spiny- Royalty Free Stock Photo

Sonchus asper, Prickly sow-thistle, Spiny sowthistle Royalty Free Stock Photo

Jombang or Sonchus asper, prickly sow thistle, rough milk thistle, prickly sowthistle, sharp-leaved sow thistle Royalty Free Stock Photo

Sonchus asper flower, also commonly known as prickly sow-thistle, rough milk thistle, spiny sowthistle, sharp-fringed sow Royalty Free Stock Photo

Sonchus asper, the prickly sow-thistle, rough milk thistle, spiny sowthistle, sharp-fringed sow thistle Royalty Free Stock Photo

Close up of a yellow Prickly Sowthistle flower. Also known as Rough Milk Thistle and Sharp-fringed or Spiny-leaved Sow Thistle, it is an invasive species. Henrie Valley, Burlington, Ontario, Canada