Plants 300-450 mm high, forming tufts. Stem usually unbranched, lightly compressed, bearing several sessile lateral flower clusters. Leaves several, mostly basal, linear, mostly 3-5 mm wide, firm and leathery. Flower clusters several, each (1)2-to 4-flowered; spathes greenish with translucent margins, 20-28 mm long, bracts dry-membranous, shorter than spathes. Flowers on pedicels 7-10 mm long, large, blue to pale mauve, outer tepals with transparent to translucent, light brown windows on lower margins; tepals 25-30 mm long, outer ± obliquely obovate, inner ± fiddle-shaped, slightly larger than outer. Filaments 5-6 mm long; anthers 7-8 mm long. Ovary cylindric-trigonous, 8-12 mm long; style 12-16 mm long, stigma lobes broad, spreading, deeply fringed. Capsules elongate, woody, indehiscent, deeply 3-lobed, 35-50 mm long. Seeds triangular-columnar, many per locule, arranged in a single vertical row.
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Rhizomatous perennial, 20-40 cm, forming clumps, stems unbranched, lateral flower clusters sessile or lacking. Leaves linear, narrow. Flowers large, lilac to purple, inner tepals with transparent to translucent bronze windows on lower margins. Capsules elongate.