Silphium radula var. gracile

(A. Gray) J. A. Clevinger

Novon 14: 277. 2004.

Common names: Slender rosinweed
Endemic
Basionym: Silphium gracile A. Gray Proc. Amer. Acad. Arts 8: 653. 1873
Treatment appears in FNA Volume 21. Treatment on page 81. Mentioned on page 80.

Plants 30–100 cm. Basal leaves persistent. Heads to 15. Ray florets 12–18. Disc florets 100–150. 2n = 14.


Phenology: Flowering summer.
Habitat: Prairies, fencerows, roadsides
Elevation: 0–300 m

Discussion

Selected References

None.

Lower Taxa

None.
Jennifer A. Clevinger +
(A. Gray) J. A. Clevinger +
Silphium gracile +
Slender rosinweed +
La. +  and Tex. +
0–300 m +
Prairies, fencerows, roadsides +
Flowering summer. +
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 radula var. gracile +
Silphium radula +
variety +