Spiny Sow-thistle Sonchus asper (Linnaeus) HillNon-native  Synonyms: Prickly sow-thistle.

There are 104 records in the project database.

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Spiny Sow-thistle in bloom in Somerset Co., Maryland (10/20/2012). This is an introduced species from Europe. Photo by Jim Brighton. (MBP list)

Spiny Sow-thistle in Howard Co., Maryland (5/10/2010). Photo by Bill Harms. (MBP list)

Spiny Sow-thistle in Baltimore City, Maryland (7/14/2017). Photo by Kirsten Johnson. (MBP list)

Spiny Sow-thistle blooming in Howard Co., Maryland (5/21/2013). Photo by Joanne Solem. (MBP list)

Spiny Sow-thistle in Prince George's Co., Maryland (5/4/2017). Photo by Bill Harms. (MBP list)

Spiny Sow-thistle in Caroline Co., Maryland (9/23/2017). Photo by Wayne Longbottom. (MBP list)

Spiny Sow-thistle blooming in Washington Co., Maryland (6/19/2014). Photo by Kimberly Booth. (MBP list)

Prickly Sow-thistle blooming in November in Ocean City, Maryland (11/10/2013). Photo by Bill Hubick. (MBP list)

Spiny Sow-thistle in Anne Arundel Co., Maryland (5/8/2017). Photo by Wayne Longbottom. (MBP list)

Spiny Sow-thistle in Caroline Co., Maryland (5/7/2017). Photo by Wayne Longbottom. (MBP list)


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