Native & Naturalized Plants of the Carolinas & Georgia


259

Forb
Biennial

Native to the Carolinas & Georgia
Documented growing wild in GA NC SC

Common (rare in Mountains)

Look for it on roadsides, woodlands, pine savannas, per Weakley's Flora

map
To see a detailed map, click here

 

full sun partial shade ...Variable

LEAVES:
Simple
Basal rosette & alternate

FLOWER:
Spring/Summer
Disc: Purplish-red (yellowish in the Coastal Plain)
Rays: Absent
Bisexual
Inferior ovary

FRUIT:
Spring/Summer
Achene

 

TO LEARN MORE about this plant, look it up in a good book!



Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales

WEAKLEY'S FLORA (11/30/12):
Cirsium horridulum var. horridulum   FAMILY Asteraceae__

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Cirsium horridulum var. horridulum   FAMILY Asteraceae__

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (1968) 179-25-003:
Carduus spinosissimus   FAMILY Asteraceae__

 

COMMON NAME:
Common Yellow Thistle, Purple Thistle


Click or hover over the thumbnails to see larger pictures.

image of Cirsium horridulum var. horridulum

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.

image of Cirsium horridulum var. horridulum

JK Marlow    jkm160426_133

April    Greenville County    SC

image of Cirsium horridulum var. horridulum

JK Marlow    jkm160426_134

April    Greenville County    SC

Leaves villous above, grayish arachnoid beneath, dissected, not decurrent, per Vascular Flora of the Carolinas.

image of Cirsium horridulum var. horridulum

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.

image of Cirsium horridulum var. horridulum

Keith Bradley    kab_c_horridulum_0656

April    Lexington County    SC

image of Cirsium horridulum var. horridulum

Keith Bradley    kab_c_horridulum_3416

April    Richland County    SC

Heads 1-10, rarely more, racemose, per Vascular Flora of the Carolinas.

image of Cirsium horridulum var. horridulum

Keith Bradley    kab_c_horridulum_3436

April    Richland County    SC

image of Cirsium horridulum var. horridulum

Roxanna Martin    rlm4210_024

April    Spartanburg County    SC

image of Cirsium horridulum var. horridulum

Richard and Teresa Ware    rtw_c_horridulum_horridul

April        

Leaves spiny on the margin, pinnately lobed, stalkless, clasping stem, per Guide to the Wildflowers of SC.

image of Cirsium horridulum var. horridulum

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.

image of Cirsium horridulum var. horridulum

JK Marlow    jkm140521_110

May    Greenville County    SC

Swamp Rabbit Trail

image of Cirsium horridulum var. horridulum

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.

image of Cirsium horridulum var. horridulum

JK Marlow    jkm180506_1895

May    Crawford County    GA

image of Cirsium horridulum var. horridulum

JK Marlow    jkm180506_1896

May    Crawford County    GA

image of Cirsium horridulum var. horridulum

JK Marlow    jkm180506_475

May    Crawford County    GA

image of Cirsium horridulum var. horridulum

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.


click here to see other plants that look similar to this COMPARE involucral bracts of Thistles

image of Cirsium horridulum var. horridulum

Richard and Teresa Ware    rtw_cirsium_horridulum

May        

Yellow Thistle is a robust plant w large purple heads frequently > 2" across, per Wildflowers of the Southern Mountains.

image of Cirsium horridulum var. horridulum

Richard and Teresa Ware    rtw_cirsium_horridulum_5

May        

Yellow-flowered plants are found only in the coastal plain, per Wildflowers of the Southern Mountains.