Silphium terebinthinaceum var. pinnatifidum

(Elliott) A. Gray

Manual, 220. 1848.

Basionym: Silphium pinnatifidum Elliott Sketch Bot. S. Carolina 2: 462. 1823
Treatment appears in FNA Volume 21. Treatment on page 78.

Leaves pinnately lobed (lobes to 13, sinuses relatively shallow to deep, sometimes almost to midrib; ultimate margins entire or toothed). 2n = 14.

Phenology: Flowering mid summer–early fall.
Habitat: Wet or dry prairies, fens, open, disturbed sites
Elevation: 100–500 m



Ala., Ga., Ill., Ky., Mich., Ohio, Tenn.


Selected References


Lower Taxa

Jennifer A. Clevinger +
(Elliott) A. Gray +
Silphium pinnatifidum +
Ala. +, Ga. +, Ill. +, Ky. +, Mich. +, Ohio +  and Tenn. +
100–500 m +
Wet or dry prairies, fens, open, disturbed sites +
Flowering mid summer–early fall. +
Undefined (tribe Undefined) subtribe Enceliinae +, Undefined (tribe Undefined) subtribe Engelmanniinae +, Undefined (tribe Undefined) subtribe Spilanthinae +, Undefined (tribe Undefined) subtribe Verbesininae +  and Undefined (tribe Undefined) subtribe Zinniinae +
Silphium terebinthinaceum var. pinnatifidum +
Silphium terebinthinaceum +
variety +