Native & Naturalized Plants of the Carolinas & Georgia


3788

Forb
Perennial

Native to Georgia
Documented growing wild in GA - -

Rare

Look for it in limestone glades and woodlands, per Weakley's Flora

map
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LEAVES:
Simple
Alternate (basal persistent)

FLOWER:
Summer/Fall
Rays: Yellow
Disc: Yellow
Disc flowers functionally staminate/ Ray flowers pistillate & fertile
Flower heads with 17-29 ray flowers, notched at apex
Inferior ovary

FRUIT:
Summer/Fall
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):
Silphium pinnatifidum   FAMILY Asteraceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Silphium pinnatifidum   FAMILY Asteraceae

LESS THAN Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Silphium terebinthinaceum

SYNONYMOUS WITH Floristic synthesis of North America. BONAP (Kartesz, 2010)
Silphium terebinthinaceum var. pinnatifidum

 

COMMON NAME:
Cutleaf Prairie-dock, Tansy Rosinweed


Click or hover over the thumbnails to see larger pictures.

image of Silphium pinnatifidum

Richard and Teresa Ware    rtw_silphium_pinnatifidum

August        

Basal leaves elliptic, half as wide as long, pinnatifid, long-stalked, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.

image of Silphium pinnatifidum

Richard and Teresa Ware    rtw_s_pinnatifidum_2

September        

Rays 13-21, about 1" long; disk 0.6-1.4" wide; both yellow, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.