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Silphium wasiotense
M. Medley
Family:
Asteraceae
Appalachian Rosinweed
FNA
Resources
Jennifer A. Clevinger in Flora of North America (vol. 21)
Plants
caulescent, 60-150 cm; fibrous rooted.
Stems
terete, hispid (never glaucous).
Leaves:
basal persistent, petiolate; cauline opposite, petiolate (proximal) or sessile (distal); blades cordate, deltate, lanceolate, or ovate, 1-28 × 1.5-20 cm, sometimes (proximal) lobed, bases auriculate, cordate, or truncate (proximal and distal), ultimate margins toothed or entire, apices acute to acuminate, faces hispid.
Phyllaries
12-14 in 2-3 series, outer reflexed, apices acute to obtuse, abaxial faces hispid.
Ray florets
6-14; corollas yellow.
Disc florets
30-45; corollas yellow.
Cypselae
4-8 × 4-6 mm;
pappi
0.5-1.5 mm.
Flowering late summer-fall. Dry, open sites in mesic forests, along roadcuts; 300-600 m; Ky., Tenn.
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This project was made possible in part by the Institute of Museum and Library Services [MG-70-19-0057-19].
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