Silphium mohrii


Bull. Torrey Bot. Club 24: 493, plate 315. 1897.

Common names: Shaggy rosinweed
Treatment appears in FNA Volume 21. Treatment on page 81. Mentioned on page 78.

Plants caulescent, 40–160 cm; fibrous rooted. Stems terete, shaggy-hispid. Leaves: basal persistent, petiolate; cauline usually alternate, sometimes opposite, petiolate or sessile; blades lanceolate to narrowly ovate, 1.5–26 × 0.5–14 cm, bases attenuate to acute, margins coarsely toothed or entire, apices acuminate, faces shaggy-hispid. Phyllaries 14–19 in 2–3 series, outer appressed, apices acuminate to acute, abaxial faces shaggy-hispid. Ray florets 10–20; corollas pale yellow. Disc florets 40–85; corollas pale yellow. Cypselae 6–10 × 4–7 mm; pappi 1–2 mm.

Phenology: Flowering late summer–early fall.
Habitat: Prairies, clearings, fence rows, sandy soils
Elevation: 100–400 m


Selected References


Lower Taxa

... more about "Silphium mohrii"
Jennifer A. Clevinger +
Shaggy rosinweed +
Ala. +, Ga. +  and Tenn. +
100–400 m +
Prairies, clearings, fence rows, sandy soils +
Flowering late summer–early fall. +
Bull. Torrey Bot. Club +
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 mohrii +
Silphium +
species +