Cleisostoma fuerstenbergianum Kraenzlin Repert. Spec. Nov. Regni Veg. 7: 39. 1909.

长叶隔距兰 ye ge ju lan

Cleisostoma flagellare (Schlechter) Garay; C. flagelliforme (Rolfe ex Downie) Garay; Sarcanthus flagellaris Schlechter; S. flagelliformis Rolfe ex Downie; S. fuerstenbergianus (Kraenzlin) J. J. Smith.

Stems erect or arching, more than 50 cm, rather slender, 4-5 mm in diam., branched or unbranched, laxly many leaved, internodes 3-4 cm. Leaves secund, terete, ca. 25 cm × 2-3 mm, fleshy, obtuse. Inflorescence lateral, ascending, to 20-24 cm, usually shorter than leaves, unbranched or rarely branched, laxly many flowered; peduncle 2-4 cm; floral bracts narrowly ovate-lanceolate, ca. 2 mm, membranous. Flowers: sepals and petals yellow with purplish brown stripes, lip white, proximal margin of lateral lobes purple; pedicel and ovary ca. 1 cm. Dorsal sepal ovate-elliptic, cymbiform, 4.5-5 × ca. 2 mm, obtuse; lateral sepals suboblong, 4.5-5 × ca. 2.5 mm, base adnate to column foot. Petals narrowly oblong, ca. 4 × 1.5 mm, obtuse; lip lateral lobes erect, deltoid, falcate, incurved, proximal margin inflexed; mid-lobe sagittate-triangular, subfleshy, with an adaxial ridge; spur subglobose, concave, 2-3 mm in diam., interior septate, with a 3-lobed back wall callus; lateral lobules triangular, slightly recurved; mid-lobule nearly as long as lateral lobules, slightly concave at center, base densely papillate-hairy. Column ca. 3 mm; rostellum small; anther cap truncate; stipe ovate-lanceolate; viscidium suborbicular, wider than stipe. Fl. May-Jun. 2n = 38.

Epiphytic on tree trunks in broad-leaved evergreen forests; 700-2000 m. SW Guizhou, S and W Yunnan [Cambodia, Laos, Thailand, Vietnam].