Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Cirsium at Vascular Plants of North Carolina.
Common Yellow Thistle, Purple Thistle, Bristle Thistle, Horrid Thistle
To see larger pictures, click or hover over the thumbnails.
Roxanna Martin rlm22109_006
February Spartanburg County SC
This upright biennial first appears as a densely spiny-leafed rosette, per Forest Plants of the Southeast and Their Wildlife Uses.
JK Marlow jkm160426_134
April Greenville County SC
Leaves villous above, grayish arachnoid beneath, dissected, not decurrent, per Vascular Flora of the Carolinas.
Keith Bradley kab_c_horridulum_02112
April Miami-Dade County FL
Outer and middle phyllaries appressed-ascending, margins setulose-ciliolate, per Flora of North America.
Keith Bradley kab_c_horridulum_3416
April Richland County SC
Heads 1-10, rarely more, racemose, per Vascular Flora of the Carolinas.
Richard and Teresa Ware rtw_c_horridulum_horridul
Leaves spiny on the margin, pinnately lobed, stalkless, clasping stem, per Guide to the Wildflowers of SC.
John B. Nelson jbn_486408361_e5788d3461
May Beaufort-Hampton Counties SC
The yellow-flowered form is restricted to the Coastal Plain, per Guide to the Wildflowers of SC.
JK Marlow jkm140521_115
May Greenville County SC
Swamp Rabbit Trail
The bristles (technically "pappus") on seeds expand into fluffy thistledown, per Atlantic Coastal Plain Wildflowers.
Roxanna Martin rlm5509_064
May Spartanburg County SC
Flower heads more or less enclosed by an outer whorl of spiny leaf-like bracts, per Vascular Flora of the Carolinas.
COMPARE involucral bracts of Thistles
Richard and Teresa Ware rtw_cirsium_horridulum
Yellow Thistle is a robust plant w large purple heads frequently > 2" across, per Wildflowers of the Southern Mountains.
Richard and Teresa Ware rtw_cirsium_horridulum_5
Yellow-flowered plants are found only in the coastal plain, per Wildflowers of the Southern Mountains.
Native to the Carolinas & Georgia
Documented growing wild in GA NC SC
Common (rare in Mountains)
IS THE PLANT "ARMED"?
Leaf margins spiny
Basal rosette & alternate
Disc: Purplish-red (yellowish in the Coastal Plain)
TO LEARN MORE about this plant, look it up in a good book!
- Atlantic Coastal Plain Wildflowers p072
- Forest Plants of the Southeast and Their Wildlife Uses p032
- Guide to the Wildflowers of SC p368
- Newcomb's Wildflower Guide p430
- Wildflowers of the Atlantic Southeast p393
- Wildflowers of the Carolina Lowcountry p196
- Wildflowers of the Eastern United States p131
- Wild Flowers of NC, 2nd edition p253
- Wildflowers of Tennessee p285
- Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians p334
- Wildflowers of the Southern Mountains p185
- Wildflowers of the Sandhills Region p335
- Weeds of Southern Turfgrasses p088