紫瓣石斛（植物分类学报）
Dendrobium parishii Rchb. f. in Bot. Zeit. 21: 236. 1863; Batemann in Bot. Mag. 91: t. 5488. 1865; Hook. f., Fl. Brit. Ind. 5: 740. 1890; Kraenzl. in Engler, Pflanzenr. 45 (IV. 50, II. B. 21): 39. 1910; Z. H. Tsi in Acta Phytotax. Sin. 18 (4): 444. 1980; S. J. Cheng et C. Z. Tang in Acta Bot. Yunnan. 6 (3): 282. 1984; Seidenf. in Opera Bot. 83: 62, fig. 34. 1985; Averyanov, Vasc. Pl. Syn. Vietnam. Fl. 1: 78. 1990; Seidenf., l. c. 114: 231. 1992; Averyanov, Iden. Guide Vietnam. Orch.: 196. 1994; 共中国兰花全书: 169, 图6-13 (8). 1998.
Guizhou (Xingyi), SE Yunnan (Wenshan) [NE India, Laos, Myanmar, Thailand, Vietnam]. |
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Stems ascending or pendulous, cylindric, usually 10-30 cm or longer, stout, 1-1.3 cm in diam., upper part ± curved, unbranched, with several nodes, internodes to 4 cm. |
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Leaves narrowly oblong, 7.5-12.5 × 1.6-1.9 cm, leathery, apex obtuse and unequally bilobed; leaf sheath white, membranous. |
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Inflorescence lateral on old leafless stem, 1-3-flowered; peduncle 3-5 mm; basal sheaths 3 or 4, overlapping, short; floral bracts ovate-lanceolate, ca. 7 mm, acute. Pedicel and ovary 4-5 cm. Flowers spreading, large, thin, purplish red, disk with a deep purple blotch on either side, column white, anther cap purple. Dorsal sepal obovate-lanceolate, ca. 27 × 7 mm, 5-veined, apex obtuse; lateral sepals ovate-lanceolate, ca. as long as dorsal sepal and slightly narrower, 5-veined, apex acuminate; mentum narrowly conic, ca. 6 mm, obtuse. Petals broadly elliptic, slightly shorter but much wider than sepals, 5-veined, base shortly clawed, margin ciliate or denticulate, apex acute; lip rhombic-orbicular, ca. 20 × 16 mm, both surfaces densely pilose, shortly clawed, claw with a raised notched ridge on front, both sides embracing column below middle, margin densely ciliate, apex acute. Column ca. 7 mm; anther cap conic, surface papillate, front margin irregularly denticulate.
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