Perennial herb, geophyte, 0.7-0.9 m high, solitary or rarely in small clumps; corm with unbroken, pale, coriaceous tunics; stem erect, simple. Leaf 1, canaliculate, conduplicate when dry. Spathes herbaceous. Inflorescence with bright yellow flowers; nectar guides orange; outer tepals up to 70 mm long, reflexed; inner tepals 50-60 mm long, erect. Stamens: filaments up to 13 mm long, united in lower half; anthers up to 15 mm long, linear; pollen white. Ovary linear, 20-30 mm long; style branches ± 20 mm long; crests short. Flowering time Oct.-May.