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Herbs perennial. Roots long, stout. Stem erect, hollow, sulcate, glabrous or strigose. Leaves basal and cauline, simple, sinuate-dentate or palmate, the basal ones sparse, dense, or in a rosette, larger than the alternate cauline leaves, the latter sometimes lacking; ocrea usually large, membranous, margin entire. Inflorescence simple or branched, usually paniculate, or spikelike or spherical. Pedicel articulate. Flowers bisexual or polygamo-monoecious. Perianth persistent, tepals 6. Stamens usually 9 (6+3), rarely 7 or 8. Styles 3, short, horizontal; stigmas inflated, recurved. Achenes trigonous, winged.
Stout perennial herbs forming large clumps; rhizomes ± woody. Lvs mainly radical, large, ovate to reniform, ± cordate, palmately veined; ochreae prominent and loose. Fls in large diffuse panicles, ☿, green, whitish or red. Perianth segments 6, free, equal, not accrescent, not keeled. Stamens (6)-9. Styles 3, very short; stigmas capitate. Fr. a trigonous nut, strongly 3-winged, lacking spines.
