Eulophia aurantiaca Rolfe

A terrestrial herb 30–60(–75) cm. tall.. Perennating organs subterranean, irregularly ellipsoidal-conical, tuberous, successively produced annually in a row, 3–4 cm. long, 2.5–3 cm. diameter, drying yellow; roots from base of new growth, 1 mm. diameter, white.. Leaves 2–3, plicate, erect, linear, acuminate, 20–65 cm. long, 4–14 mm. wide, long-petiolate.. Inflorescence laxly 8–20-flowered, produced before or with young leaves; peduncle almost covered by 2–3 sheathing bracts, upper one linear-lanceolate; rhachis 6–20 cm. long, bracts linear-lanceolate, acuminate, 12–21 mm. long.. Flowers orange or orange-red, spreading to subnutant, not opening widely, slightly fragrant; pedicel and ovary 12–20 mm. long.. Dorsal sepal linear-lanceolate, acute or acuminate, 3.1–4 cm. long, 6–7 mm. wide; lateral sepals similar but oblique at base, 2.8–4.2 cm. long, 5–7 mm. wide.. Petals linear-lanceolate, acute or acuminate, 2.2–2.7 cm. long, 6–7 mm. wide.. Lip 3-lobed, porrect, 1.6–2 cm. long, 1–1.2 cm. wide; side lobes rounded; mid-lobe much longer, emarginate, 8 mm. long, 9 mm. wide; callus of 2 papillose ridges in basal half with central area of mid-lobe densely long-papillate.. Spur very shortly conical, 1–2 mm. long.. Column 6–8 mm. long; foot 3–4 mm. long.. Fruit pendent, 23–25 mm. long, with persistent perianth.