长足兰 双臂长足兰（植物分类学报）
Pteroceras leopardinum (Par. et Rchb. f.) Seidenf. et Smitin., Orch. Thailand 4 (1): 535, fig. 395. 1963; Seidenf. in Opera Bot. 95: 256, fig. 162. 1988; Averyanov, Vasc. Pl. Syn. Vietnam. Fl. 1: 146. 1990; Seidenf., l. c. 114: 429. 1992; H. A. Pedersen in Opera Bot. 117: 40. 1993; Averyanov, Iden. Guide Vietnam. Orch.: 368. 1994; Z. H. Tsi et S. C. Chen in Acta Phytotax. Sin. 33 (3): 295. 1995; 中国兰花全书: 66. 1998. ——Thrixspermum leopardium Par. et Rchb. f. in Trans. Linn. Soc. 30: 145. 1878.
Epiphytic on tree trunks in open forests or at forest margins; 900-1300 m. S Yunnan [India, Malay Archipelago (Borneo), Myanmar, Philippines, Thailand, Vietnam].
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Stems 2-10 cm, 4-5 mm in diam., rigid, 3-6-leaved. |
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Leaf blade suboblong, 9.5-14 × 1.5-2 cm, thinly leathery, acute. |
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Racemes 2-6, 1-2 cm, to 10-flowered; peduncle and rachis dilated distally, glabrous, longitudinally ribbed; floral bracts ovate-triangular, ca. 1 mm. Flowers slightly fleshy, yellow with purplish brown spots, lip white abaxially, spur white; pedicel and ovary 5-6 mm, ovary strongly 3-keeled. Dorsal sepal subovate-lanceolate, ca. 4 × 2 mm, obtuse; lateral sepals broadly ovate-triangular, ca. 4 × 4 mm, obtuse. Petals oblong, ca. 4 × 1.5 mm, obtuse; lip movable, 3-lobed; lateral lobes erect, oblong, ca. 3 × 1 mm, obtuse-rounded; mid-lobe ovate-triangular, ca. 1.5 × 1 mm, fleshy, base with 2 calli on either side, apex obtuse; spur conic-oblong, ca. 4 × 2 mm, inside densely hairy, apex obtuse. Column ca. 2 mm, thick, foot ca. 3 mm. Fl. May. |
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