Shrubs 300-500(-800) mm high. Stem with several branches from base, branching irregularly, leafy terminal branches compressed, ± 3 mm wide. Leaves narrowly lanceolate to ± linear, mostly 50-70 x 3-4 mm, veins not evident when alive. Inflorescence compound, a flat-topped false panicle of 40 to 120 flowers (20 to 60 flower pairs), primary peduncles exserted from leaves, compressed, 2-winged, 3.0-4.5 mm wide, ultimate branches bearing paired flowers within opposed spathes; spathes 3-4 mm long, outer slightly larger than inner, leathery, red-brown, or green near bases, dry and dark brown above; floral bracts dry, reddish brown, much wrinkled, ± 5 mm long. Flowers salver-shaped, heterostylous, mostly pale blue, sometimes middle blue (rarely white), white at base of tepals and in tube; perianth tube cylindric, ± 5.5 mm long; tepals subpatent, held ± 30° above horizontal, lanceolate-elliptic, 6.3-7.0 x ± 2.4-3.0 mm. Filaments suberect, ± 6 mm long (thrum morph) or ± 2 mm long (pin morph); anthers ± 1.3 mm long, pale blue; pollen whitish. Style filiform, either emerging 2 mm from tube (thrum morph) or 7-8 mm from tube (pin morph), dividing into 3 linear stigma lobes, each ± 0.4 mm long. Capsules ovoid, ± 5 mm long, usually only 1 fertile locule fertile. Seeds usually single, 3.0-3.5 mm long.
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Shrub 50-80 cm. Leaves sword-shaped. Flowers paired, heterostylous, tiny, pale to deep blue, anthers blue, tube ± 5.5 mm, shorter than lobes.