EcoFlora - Silphium radula var. gracile

Silphium radula var. gracile (A. Gray) J. A. Clevinger
Family: Asteraceae	FNA Resources Jennifer A. Clevinger in Flora of North America (vol. 21) Plants 30-100 cm. Basal leaves persistent. Heads to 15. Ray florets 12-18. Disc florets 100-150. 2n = 14. Flowering summer. Prairies, fencerows, roadsides; 0-300 m; La., Tex.
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