Pseudobulbs spindle-shaped, 200–500 × 10–15 mm, crowded, yellowish green, ribbed with age. Leaves 2–5, 80–150 × 20–30 mm, dark green, leathery. Racemes 80–160 mm long, 4–20-flowered. Flowers crowded, 32–38 × 30–35 mm, crystalline white, strongly fragrant. Sepals and petals widely spreading, moderately thick textured. Dorsal sepal 25–40 × 12–14 mm. Lateral sepals 15–30 × 12–15 mm. Petals 22–37 × 8–10 mm. Labellum c. 35 × 35 mm, white with purple markings; lateral lobes incurved; midlobe with Y-shaped central ridge, ending in upcurved beak-like point c. 4 mm long.
Locally common, but mostly restricted to highland forests; found growing mainly on the upper trunks and larger branches of antarctic beech, less commonly on other rainforest trees such as coachwood, occasionally on boulders and large rocks. Walsh (1996) also reports it growing on trunks of rough tree fern (Cyathea australis). The climate where it grows is cool with strong air movement, high humidity, reliable rainfall and frequent clouds and mists.
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