Herbs perennial. Basal bud scales ovate to ovate-oblong, to 5 cm, yellow farinose. Petiole broadly winged, concealed by basal bud scales at anthesis, becoming diffuse, ca. as long as leaf blade; leaf blade oblanceolate to obovate or oblong, 5--20 X 1--2.5 cm at anthesis, to 30 cm at fruiting, efarinose or yellow farinose abaxially, base attenuate to obtuse or shallowly cordate, margin crenate to denticulate, apex obtuse to acute. Scapes 7--18 cm at anthesis, elongating to 35 cm in fruit, yellow farinose distally, umbels 6-to many flowered; bracts lanceolate, 3--10 mm. Pedicel 1--2 cm, farinose. Flowers heterostylous. Calyx campanulate, 5--7.5 mm, densely yellow farinose, parted to middle; lobes ovate to ovate-oblong, margins overlapping, apex obtuse. Corolla yellow; tube 1.1--1.3 cm; limb 1.5--2.5 cm wide; lobes suborbicular, margin crenate to emarginate. Pin flowers: stamens at middle of corolla tube; style slightly exserted. Thrum flowers: stamens toward apex of corolla tube; style slightly longer than calyx. Capsule disintegrating at maturity.
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