Herbs 5-20 cm tall; short stout roots, forming dense clumps and oriented like the rays of a star, tapering to apex, 1-10 mm long; stems white to cream, simple. Leaves triangular to narrowly triangular, 2-5 mm long. Flowers solitary, 5-merous, nodding in bud, fragrant; calyx tubular-campanulate, 2.5-4 mm long, tube 1-2 mm long, lobes narrowly ovate to narrowly triangular, 1-2 mm long, sinuses mostly acute; corolla with a white to orange tube, a yellow to orange throat, and blue, rarely purple to white lobes, trumpet-shaped, 10-22 mm long, tube 7-15 mm long, inner side glabrous, lobes narrowly ovate to narrowly obovate, 2-7 mm long, falling off with upper part of corolla tube after anthesis; stamens inserted 2-3 mm below throat, filaments absent, anthers 0.5-1 mm long, free or coherent, thecae tapering toward base, apex rounded-truncate; ovary fusiform, 3-5 mm long, shortly stipitate, provided with 2 distinctly stalked glands at base, style 2-4 mm long. Capsule ellipsoid to globose, 4-7 mm long, septicidally dehiscent in middle only, margins thickened and rolling inwards; seeds filiform, 0.5-1 mm long.
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