Herbs, erect, rarely rooting at nodes. Roots tuberous, thick. Stems unbranched or sparsely branched, arachnoid-villous. Leaves 2-ranked, narrowing toward shoot apex; blade lanceolate-elliptic to ovate, 4--15 ´ 2--3.5 cm (distal leaf blades wider or narrower than sheaths when sheaths opened, flattened), base cordate-clasping, sparsely pilose to densely arachnoid-villous. Inflorescences terminal, 1--4 axillary, sessile in axils of distal reduced leaves, boat-shaped spathes absent. Flowers distinctly pedicillate; pedicels 0.6--1.4 cm, densely arachnoid-villous; sepals 6.5--8 mm, pilose to densely arachnoid-pubescent; petals distinct, rose-purple to bluish, not clawed, 10--15 mm; stamens free; filaments bearded. Capsules 3.5--4 mm. Seeds 2 mm. 2n = 12, 24, 24+ (Mexico).
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