隔距兰 ge ju lan

Sarcanthus linearilobatus Seidenfaden & Smitinand, Orchids Thailand 4(2): 684. 1965; Cleisostoma sagittiforme Garay; Ormerodia linearilobata (Seidenfaden & Smitinand) Szlachetko; O. sagittata (King & Pantling) Szlachetko; S. sagittatus King & Pantling.

Stems erect, 2-4 cm. Leaves flat, narrowly oblong, 5-18 × 1-2 cm, leathery, obtuse and unequally bilobed. Inflorescence pendulous, longer than leaves, branching, laxly many flowered; peduncle ca. 1.5 mm in diam., with 3 or 4 short sheaths below middle; floral bracts ovate-triangular, small, ca. 1 mm, acute. Flowers purplish red, small; pedicel and ovary ca. 5 mm. Dorsal sepal oblong, cymbiform, ca. 3 × 1.5 mm, obtuse; lateral sepals slightly obliquely ovate, ca. 3 × 1.5 mm, obtuse. Petals ± falcate-oblong, ca. 2.5 × 1.5 mm, obtuse; lip lateral lobes erect, deltoid, acute; mid-lobe sagittate-triangular, apex obtuse, with 2 backward triangular basal lobules on either side, with a longitudinal ridge; spur horn-shaped, ca. 5 mm, apex obtuse, inside longitudinally septate; back wall callus in interior of spur well spaced from septum, 3-lobed; lateral lobules small; mid-lobule laterally compressed, oblong, center slightly concave, base slightly bilobed; anther cap broadly emarginate; stipe ca. 0.8 mm, narrowly cuneate; viscidium suborbicular. Fl. May-Sep.

Epiphytic on tree trunks in broad-leaved evergreen forests or in open forests along valleys; 900-1600 m. S Yunnan [Bhutan, NE India, Thailand].