Perennial, geophytic herb, 90-340 mm high; stems 90-340 mm high, basally branched. Leaves opposite and decussate; blade 4-6 x 6-26 mm, linear to triangular; petioles 2-13 mm long. Inflorescences 3-8 per stem, 3-9-flowered; peduncles 12-50 mm; pedicels 6-11 mm long. Flowers: corolla lobes 5-8 x 2.0-3.5 mm, flat, dorsally green with brown or purple markings towards tip, ventrally white, veined with brownish purple; corona 2-3 mm long, cream-coloured to bright yellow-green; each lobe subquadrate in dorsal view, bearing a short simple or longer bilobed ventral appendage, lower half of ventral surface united with staminal column. Pollinia subapically attached, pyriform. Flowering time Nov.-Jan. Fruit 50-70 mm long.