NameThatPlant.net: Silphium pinnatifidum

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

Dig deeper at SERNEC, a consortium of southeastern herbaria.

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Silphium pinnatifidum FAMILY Asteraceae

COMMON NAME:
Tansy Rosinweed, Cutleaf Prairie-dock

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

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Silphium pinnatifidum FAMILY Asteraceae

3788

Forb
Perennial

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

Native to Georgia

Rare

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!

If a search such as "Carex leptalea var. leptalea" doesn't deliver the results you want, try "Carex leptalea".
Or, to minimize chances of a misspelling, try just "Carex le".

Less is more: If "pencil flower" doesn't deliver the results you want, try "pencil".