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Silphium radula var. radula
var. radula
Family:
Asteraceae
Images
not available
Flora of North America
Resources
Jennifer A. Clevinger in Flora of North America (vol. 21)
Plants
50-250 cm.
Basal leaves
caducous.
Heads
to 30.
Ray florets
20-30+.
Disc florets
125-175.
2
n
= 14.
pappi
0.5-2 mm.
2n
= 14. Flowering summer. Prairies, fencerows, roadsides; 0-400 m; Ark., Kans., La., Mo., Okla., Tex. 6-8.5 × 4-7 mm.
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