Herbs, erect or ascending, rarely rooting at nodes. Roots 1--1.5(--2) mm thick, scarcely fleshy. Stems unbranched or sparsely branched, 5--50 cm; internodes densely spreading, pilose or hirsute to glabrous. Leaves spirally arranged, sessile; blade linear-lanceolate, 10--32 ´ 0.6--2 cm (distal leaf blades equal to or narrower than sheaths when sheaths opened, flattened), apex acuminate, usually pilose, occasionally glabrous or glabrescent. Inflorescences terminal, sometimes axillary; bracts foliaceous, well developed, not saccate, sparsely to densely pilose. Flowers distinctly pedicillate; pedicels 1--3 cm, usually pilose; sepals not inflated, 7--16 mm, usually uniformly eglandular-pilose, rarely a few inconspicuous glandular hairs present; petals distinct, bright blue to rose, rarely white, broadly ovate, not clawed, 12--19 mm; stamens free; filaments bearded. Capsules 5--7 mm. Seeds 2--3 mm. 2n = 12, 24.
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