Petasites frigidus var. palmatus
Rhodora 48: 124. 1946.
Basal leaves: blades palmately nerved, orbiculate or cordate to reniform, 2–40 × 4–50 cm, margins palmately lobed (primary lobes 5–11, lanceolate to oblong or cuneate, sinuses more than halfway to bases, sometimes secondary lobes 0–13, entire or dentate, teeth to 52 per side), adaxial and abaxial faces glabrous or woolly, sometimes glabrescent. Staminate heads 4–32; ray (or pistillate) florets 5–70, corolla laminae 0 or 0.1–6.3 mm; disc floret style branches 0–1.7 mm. Pistillate heads 8–42; ray (or pistillate) florets 51–125, corolla laminae 0 or 0.1–6.3 mm; disc florets: corolla lobes 0.5–2.9 mm, style branches 0–0.8 mm, papillate or hairy. Pappi (pistillate) to 11.8 mm. 2n = 60, 61, 62.
Phenology: Flowering early spring.
Habitat: Moist disturbed areas, stream banks, fens, swamps, roadside ditches and embankments, logging roads, moist forest soils
Elevation: 10–1500 m
Distribution
St. Pierre and Miquelon, Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut, Ont., P.E.I., Que., Sask., Yukon, Calif., Conn., Idaho, Maine, Mass., Mich., Minn., N.H., N.Y., N.Dak., Oreg., R.I., Vt., Wash., Wis.
Discussion
Selected References
None.