Sonchus asper Prickly Sow-thistle ID: 0000 0000 0104 0674 [detail] © 2004 Robert E. Preston, Ph.D.	Sonchus asper Spiny Sowthistle ID: 0000 0000 0306 0367 [detail] © 2006 Chris Wagner, SBNF	Sonchus asper Spiny Sowthistle ID: 0000 0000 0306 0368 [detail] © 2006 Chris Wagner, SBNF	Sonchus asper Spiny Sowthistle ID: 0000 0000 0306 0369 [detail] © 2006 Chris Wagner, SBNF
Sonchus asper ID: 0000 0000 0506 3208 [detail] © 2006 Louis-M. Landry	Sonchus asper ID: 0000 0000 0506 3209 [detail] © 2006 Louis-M. Landry	Sonchus asper ID: 0000 0000 0506 3210 [detail] © 2006 Louis-M. Landry	Sonchus asper ID: 0000 0000 0506 3212 [detail] © 2006 Louis-M. Landry
Sonchus asper ID: 0000 0000 0407 0773 [detail] © 2007 Luigi Rignanese	Sonchus asper ID: 0000 0000 0407 0778 [detail] © 2007 Luigi Rignanese	Sonchus asper Prickly Sow Thistle ID: 0000 0000 0616 1547 [detail] © 2016 Jorg & Mimi Fleige	Sonchus asper ID: 0000 0000 0511 0116 [detail] © 2011 Michael O'Brien
Sonchus asper Sow Thistle ID: 0000 0000 0511 1119 [detail] © 2011 Michael O'Brien	Sonchus asper ID: 0000 0000 0511 2389 [detail] © 2011 Michael O'Brien	Sonchus asper ID: 0000 0000 0511 2530 [detail] © 2011 Michael O'Brien	Sonchus asper Sow Thistle ID: 0000 0000 0611 1653 [detail] © 2011 Michael O'Brien
Sonchus asper Spiny Sowthistle ID: 0000 0000 0413 1026 [detail] © 2013 David Wolfson	Sonchus asper Spiny Sowthistle ID: 0000 0000 0413 1027 [detail] © 2013 David Wolfson	Sonchus asper Spiny Sow Thistle ID: 0000 0000 0515 2743 [detail] © 2015 Robert Sikora	Sonchus asper Prickly Sow Thistle ID: 0000 0000 0715 0506 [detail] © 2015 Jean Pawek
Sonchus asper Prickly Sow Thistle ID: 0000 1111 4321 1233 [detail] 2020 National Park Service	Sonchus asper Prickly Sow Thistle ID: 0000 1111 4321 1232 [detail] 2020 National Park Service	Sonchus asper ID: 0000 0000 1019 1854 [detail] © 2019 John Doyen	Sonchus asper ID: 0000 0000 0919 1724 [detail] © 2019 John Doyen

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos.