挺茎贝母兰（植物分类学报）
Coelogyne rigida Par. et Rchb. f. in Trans. Linn. Soc. 30: 146. 1874; Pfitz. et Kraenzl. in Engler’s Pflanzenreich IV (50) Heft 32: 81 1907; Seidenf. in Dansk Bot. Ark. 29 (4): 73. fig. 30. 1975, et Opera Bot. 114: 117. 1992; Averyanov, Iden. Guide Vietnam. Orch. 133. 1994; Z. H. Tsi et S. C. Chen in Acta Phytotax. Sin. 33 (3): 290. 1995.
On trees in forests in limestone areas; 700-800 m. S Yunnan [NE India, Myanmar, Thailand, Vietnam]. |
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Pseudobulbs on stout, creeping, heavily sheathed rhizome, 3-5 cm apart, suboblong or oblong-cylindric, to 9 × ca. 1.3 cm, somewhat attenuate toward apex, with 2 leaves at apex. |
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Leaf blade suboblong-oblanceolate, 27-30 × 4.6-5 cm, leathery, base cuneate, apex acuminate; petiole 4-6 cm. |
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Inflorescence hysteranthous, ca. 20 cm, with 10 imbricate, convolute, sheathing sterile bracts at interface between peduncle and rachis forming a tube 3.5-4 cm; rachis 8-flowered, slightly flexuose; floral bracts not completely deciduous at anthesis, ovate-lanceolate, 1.8-1.9 cm; pedicel and ovary 7-8 mm. Flowers small. Dorsal sepal suboblong-elliptic, 8-10 × 4-5 mm, 3-veined; lateral sepals suboblong, 9-11 mm, slightly narrower than dorsal sepal, 3-veined. Petals linear, ca. 9 × 1 mm, 1-veined; lip subovate, 8-10 mm, 3-lobed; lateral lobes erect; mid-lobe nearly elliptic, 3-4 mm, margin somewhat undulate, apex emarginate; callus with 3 longitudinal lamellae; lamellae conspicuously crisped, extending to mid-lobe, median lamella shorter. Column slightly arcuate, 5-6 mm, both sides winged; wings below middle very narrow, upper part slightly wider, ca. 0.5 mm wide on one side. Fl. Jun-Jul. |
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