Thereianthus longicollis (Schltr.) G.J.Lewis

Plants 150-350 mm high. Corm 10-15 mm diam.; tunics of coarsely netted fibres, thickened and claw-like at base, accumulating with age. Stem erect. Leaves 4, lowermost reaching or exceeding spike, ± dry at flowering, linear, 200-250 x 1-2 mm, closely 3-ribbed, uppermost leaf with short blade 20-60 mm long. Spike densely 7-to 15(-20)-flowered; bracts overlapping for 1/2-2/3 length, 8-12(-17) mm long and 2 or 3 internodes long, outer acute, either green below or entirely brown and leathery, conspicuously and closely veined, with narrow membranous margins, inner slightly shorter, ± membranous with narrow brown zones along veins. Flowers suberect, white or pale pink to purple-pink with purple tube, lower three tepals each with purple chevron or diamond-shaped markings near base; perianth weakly zygomorphic; tube slightly curved outward in distal 3 mm, 25-40 mm long, ± 2 mm diam. at mouth, ± cylindric but dilated slightly distally, exserted 20-30 mm beyond bracts, 2.0-2.5 x longer than tepals; tepals oblong-oblanceolate, inner 3 slightly smaller, spreading and slightly cupped, 12-17 x 2.5-5.5 mm. Stamens arcuate; filaments 6 mm long, exserted 3 mm from tube; anthers 4-6 mm long, purple; pollen purple. Style arching above anthers, dividing at ± middle of anthers, branches ± 4-5 mm long, divided to near base. Capsules narrowly ovoid, 6-7 x 2.5-3.0 mm. Seeds ellipsoid-angled, ± 2.5 mm long, yellowish brown, testa striate-colliculate.