OF THE CAROLINAS & GEORGIA

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

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Silphium pinnatifidum   FAMILY Asteraceae   Go to FSUS key



SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Silphium pinnatifidum   FAMILY Asteraceae

SYNONYMOUS WITH Flora of North America north of Mexico, vol. 19-20-21 (2006)

Silphium terebinthinaceum var. pinnatifidum

INCLUDED WITHIN Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)

Silphium terebinthinaceum

SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)

Silphium pinnatifidum

 

COMMON NAME:
Tansy Rosinweed, Cutleaf Prairie-dock


         To see larger pictures, click or hover over the thumbnails.

image of Silphium pinnatifidum, Tansy Rosinweed, Cutleaf Prairie-dock

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 (Horn, Cathcart, Hemmerly, & Duhl, 2005).

image of Silphium pinnatifidum, Tansy Rosinweed, Cutleaf Prairie-dock

Stephanie C. Brundage    scb_081521hayesville05

August    Clay County    NC

image of Silphium pinnatifidum, Tansy Rosinweed, Cutleaf Prairie-dock

Stephanie C. Brundage    scb_081521hayesville06

August    Clay County    NC

image of Silphium pinnatifidum, Tansy Rosinweed, Cutleaf Prairie-dock

Stephanie C. Brundage    scb_081521hayesville07

August    Clay County    NC

image of Silphium pinnatifidum, Tansy Rosinweed, Cutleaf Prairie-dock

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 (Horn, Cathcart, Hemmerly, & Duhl, 2005).

 

 

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Silphium pinnatifidum   FAMILY Asteraceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Silphium pinnatifidum   FAMILY Asteraceae

SYNONYMOUS WITH Flora of North America north of Mexico, vol. 19-20-21
Silphium terebinthinaceum var. pinnatifidum

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

SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
Silphium pinnatifidum

 

Find by SCIENTIFIC NAME:

3788

Forb
Perennial

Habitat: limestone glades and woodlands, blackland prairies, per Weakley's Flora

Native to Georgia

Rare

map
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.

LEAVES:
Simple
Alternate & basal

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

FRUIT:
Summer/Fall
Achene

 

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



 


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