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Plants with rhizomes consisting of subspherical pseudobulbs, ringed with numerous prominent leaf scars, lying mostly below soil level; leaves tapering, 4-15 mm long; flowering stem c. 0.5-2 m tall, very stout, sometimes branched. Inflores-cences lax to dense, 10-40-flowered. Flowers: seªpals green tinged brownish purple, petals pale purple to white outside, paler within, purple-veined, lip green and purple, crests dull white. Seªpals and petals spreading; median sepal (12-) 15-22 (-29) mm long, narrowly obovate, acute to apiculate; lateral sepals similar; petals rotund to elliptic-oblong, slightly longer than the sepals. Lip 3-lobed, crests consisting of 3-5 lamellae cenªtrally, reaching more than 3 mm high on the midªlobe, their tops crenulate and the sides smooth to fluted; midlobe crispate; side lobes adnate to about half the length of the mentum; mentum 6-10 mm long; spur shortly conical, acute, 3-5 mm long. Gynostemium 9-16 mm long, operculum with 2 closely set distal lobes.
Terrestrial herb, up to 2 m high. Sepals acute to apiculate, slightly shorter than subrotund petals. Midlobe with wavy margins, purple, with 3 mm-tall blades of crests white. Flowers with sepals green, tinged with brownish purple, petals pale purple to white.
Sepals glossy olive-green, purplish at base, or purple-brown; petals pink to purple-pink; lip side lobes green veined with purple, mid-lobe purple with creamy-yellow crests; column and ovary purple; spur greenish tipped with purple.
Lip 20–40 × 14–40 mm, 3-lobed, with 3 lines of fringed lamellae running down the centre for the basal two-thirds; side lobes erect, mid-lobe 11–20 × 10–13 mm, elliptic-oblong, obtuse, the edges undulate; spur 4–10 mm long, conical.
An orchid. It is a herb that grows in soil. It grows 2 m tall. The flowering shoots are erect with 5-50 loosely arranged flowers. The flowers are purple to white. The rhizomes are fleshy and with 4-6 tubers 2-3 cm across.
Perennating organs subterranean, a fleshy rhizome to 6 cm long or more, 2–3 cm in diameter; roots stout, white, 4–5 mm in diameter.
Inflorescence 1–3 m tall, rather laxly several-to many-flowered; scape stout, with 5 tubular sheaths along its length.
Leaves 3–5, petiolate, 30–250 × 1.5–15.5 cm, lanceolate to oblanceolate, acuminate, ribbed, evergreen.
Bracts 20–35 mm long, elliptic or obovate, usually brown and withered by flowering time.
Petals 20–35 × 10–23 mm, ovate to elliptic, obtuse, lying over column.
Sepals 17–27 × 7.5–10 mm, oblanceolate, acute, concave, ± erect.
Leaves in a tuft, up to 6 ft. high and 5 in. broad
A long raceme of white and pink or purple flowers.
Capsule 3–6.5 cm long, pendent, ellipsoid.
Column 10–12 mm long, clavate.
Pedicel and ovary 4 cm long.
Large terrestrial herb.
Scapes to 81/2 ft. tall
