Thereianthus intermedius Goldblatt & J.C.Manning

Plants 200-350 mm high. Corm ± 10 mm diam.; tunics of fine-textured, netted fibres accumulating with age. Stem erect, flexed slightly outward above sheath of second leaf. Leaves (3)4, lowermost reaching base of spike or not, linear, 70-150 x 2-3 mm, thick-textured with main vein ± evident but not thickened or raised when fresh, plus a pair of secondary veins, uppermost leaf entirely sheathing or with short blade up to 20 mm long, well separated from spike. Spike moderately densely 12-to 40-flowered; bracts not or scarcely overlapping, outer 3-5 mm long, up to 1 internode long, obtuse, brown and leathery with narrow membranous margins, without evident veining, inner ± as long or slightly longer, ± membranous with narrow brown zone along veins. Flowers suberect, violet (rarely pale blue), lower 3 tepals whitish at base with purple or dark blue median chevron in lower 1/4; perianth subactinomorphic; tube straight or slightly arching in upper ± 3 mm, 10-13 mm long, cylindric, widening slightly in upper ± 3 mm; tepals narrowly oblanceolate, subequal, spreading and slightly cupped, 10-11 x 3.0-3.5 mm. Stamens unilateral; filaments erect, ± 7 mm long, exserted ± 4 mm from tube; anthers purple, 4-5 mm long; pollen violet. Style arching over stamens, dividing below base of anthers, branches ± 2.5 mm long, divided for ± 1/2 their length. Capsules ovoid, 4-5 x 3-4 mm. Seeds ovoid, ± 1.5 x 1.0 mm, with thread-like chalazal extension up to 3 mm long abruptly reflexed from near middle, reddish brown, testa striate-rugulose.