齿唇沼兰（植物分类学报）
Malaxis orbicularis (W. W. Smith et J. F. Jeffr.) T. Tang et F. T. Wang in Acta Phytotax. 1 (1): 73. 1951; S. Y. Hu in Quart. J. Taiwan Mus. 27 (3, 4): 435. 1974; Seidenf. in Dansk Bot. Ark. 33 (1): 85. fig. 59. 1978, et in Opera Bot. 114: 150. 1992; Averyanov, Iden. Guide Vietnam. Orch. 151. 1994; Z. H. Tsi et S. C. Chen in Acta Phytotax. Sin. 33 (3): 294. 1995. ——Microstylis orbicularis W. W. Smith et J. F. Jeffr. in Notes Bot. Gard. Edinb. 9: 111. 1916. ——Microstylis tenebrosa Rolfe ex Downie in Kew Bull. 369. 1925.
Forests; 800-2100 m. S and SW Yunnan.The type specimen was collected from Tengchong, Yunnan. |
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Plants terrestrial. Pseudobulbs ovoid, ca. 1 cm × 7-8 mm, ± enclosed in white membranous sheaths. |
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Leaves often 3, ovate-lanceolate, oblong-lanceolate, or ovate, 4.5-13 × 1.8-4.8 cm, base contracted into a sheathlike, amplexicaul petiole 2.5-6 cm, apex acuminate or long acuminate. |
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Inflorescence erect; peduncle 14-40 cm, wingless; rachis 5-9 cm, usually more than 10-flowered; floral bracts reflexed, linear-lanceolate, 5-7(-10) mm. Flowers dark purple or blackish purple, 6-7 mm in diam.; pedicel and ovary 5-6 mm. Dorsal sepal oblong or broadly linear, 5-6 × 1.2-1.5 mm, margin often revolute, apex obtuse; lateral sepals nearly broadly oblong, ca. 3.5 × 2 mm, base slightly oblique, apex obtuse. Petals narrowly linear, ca. 5 × 0.6 mm; lip superior, suborbicular or broadly obovate-elliptic in outline, 7-8 × ca. 5 mm, apical margin with 15-20 fimbriate teeth 0.5-1 mm, with a central depression; auricles ovate-triangular to narrowly ovate, 3.5-4 mm, surrounding column. Column ca. 1 mm, stout. Fl. Jun. |
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