A terrestrial herb 60–110 cm. tall.. Perennating organs erect, proximate, pseudobulbous, narrowly cylindric-conical to fusiform, 7–22 cm. long, 1.5–3 cm. diameter, green, covered when young by sheathing leaf-bases; roots stout, long, 6 mm. diameter, white.. Leaves 6–14, fleshy, conduplicate, linear, acute or acuminate, 11–50 cm. long, 1.4–3 cm. wide, margins serrulate.. Inflorescence laxly 5–15-flowered; peduncle bearing 4 short acute sheaths along length; rhachis 20–45 cm. long; bracts lanceolate, acuminate, 9–11 mm. long.. Flowers fleshy; sepals and petals yellow-green flushed with brown at tips; lip white or cream with a yellow callus and veined with red; pedicel and ovary 15–27 mm. long.. Dorsal sepal spreading, oblanceolate, acute or apiculate, 22–25 mm. long, 4–8 mm. wide; lateral sepals lanceolate or oblong-lanceolate, acute or apiculate, 22 mm. long, 6–7 mm. wide.. Petals oblong-lanceolate, obtuse or acuminate, 19–20 mm. long, 4.5–9 mm. wide.. Lip obscurely 3-lobed, 18–20 mm. long, 15–17 mm. wide; side lobes elliptic; mid-lobe ± quadrate; callus of 3 ridges, verrucose but not raised towards apex.. Spur 3 mm. long.. Column 11 mm. long; foot 3 mm. long.. Fruit pendent, 36–40 mm. long, 16 mm. diameter.. Pl. 3. Fig. 97/13–24.
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