Plants perennial, evergreen; scapes from bulblike rhizomes encased in fleshy petiole bases; leaves persisting, not forming overwintering buds (hibernaculae). Roots adventitious, white, unbranched. Leaves: stipules absent; petiole winged; blade greenish or bright red adaxially, of 2 subreniform, hinged lobes, margins with stout bristles (hinged along midrib, adaxial surfaces with 3 trigger hairs causing lobes to snap shut on prey when properly stimulated). Inflorescences umbel-like cymes. Flowers: petals marcescent, white; stamens (10–)15(–20), distinct; gynoecium 5-carpellate; style 1, not divided; stigma plumose. Capsules ovoid, opening irregularly. Seeds (20–)25(–30). x = 16.
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