重唇石斛（中国高等植物图鉴）
网脉唇石斛（中药志）
Dendrobium hercoglossum Rchb. f. in Gard. Chron. n. s., 25: 487. 1886; Hook. f., Fl. Brit. Ind. 6: 185. 1894; Rolfe in J. Linn. Soc. Bot. 36: 11. 1903; Kraenzl. in Engler, Pflanzenr. 45 (IV. 50, II. B. 21): 75. 1910; Summerh. in Bot. Mag. 159: t. 9428. 1936; 中国高等植物图鉴 5: 697. 图8224. 1976; 海南植物志4: 221. 1977; Z. H. Tsi in Acta Phytotax. Sin. 18 (4): 443. 1980; Seidenf. in Opera Bot. 83: 88, fig. 50. 1985; Averyanov, Vasc. Pl. Syn. Vietnam. Fl. 1: 73. 1990; Seidenf., l. c. 114: 236. 1992; Averyanov, Iden. Guide Vietnam. Orch.: 198. 1994; Z. H. Tsi et S. C. Chen in Acta Phytotax. Sin. 33 (3): 291. 1995: 中国兰花全书: 166. 图6-11 (2). 1998. ——D. wangii C. L. Tso in Sunya tsenia 1: 138. 1933; Hand. -Mazz. in Beih. Bot. Centrabl. 56 (B): 474. 1937. ——D. hercoglossum Rchb. f. var. album S. J. Cheng et C. Z. Tang in Acta Bot. Yunnan. 6 (3): 281. 1984.
Epiphytic on tree trunks in dense mountain forests, lithophytic on damp rocks in valleys; 600-1300 m. SW Anhui (Huo Shan), SW Guangdong (Xinyi), Guangxi, SW Guizhou, Hainan, Hunan (Jianghua), S Jiangxi, SE Yunnan [Laos, Malaysia, Thailand, Vietnam].
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Stems pendulous, pale yellow when dry, cylindric or sometimes thickened from base to upper part, usually 8-40 cm, 2-5 mm in diam., with few to many nodes, internodes 1.5-2 cm. |
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Leaves narrowly oblong or oblong-lanceolate, 4-10 × 0.4-0.8(-1.4) cm, leathery, with tightly clasping sheaths at base, apex obtuse and unequally bilobed. |
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Inflorescences often several, arising from old leafless stems, 2- or 3-flowered; peduncle green, 6-10 mm; rachis sometimes slightly upcurved, 1.5-2 cm, thin and weak, base with 3 or 4 short tubular sheaths; floral bracts ovate-lanceolate, small, 3-5 mm, dry membranous, apex acute. Pedicel and ovary pale pinkish red, 1.2-1.5 cm. Flowers spreading; sepals and petals pale pink, lip white, epichile pale pink, column white, anther cap purple. Dorsal sepal ovate-oblong, 13-18 × 5-8(or more) mm, 7-veined, apex acute; lateral sepals slightly obliquely ovate-lanceolate, ca. as large as dorsal sepal, 7-veined, apex acuminate; mentum very short. Petals obovate-oblong, 12-15 × 4.5-7(or more) mm, 3-veined, apex acute; lip erect, ca. 1 cm, with epichile and hypochile; hypochile subglobose, inner surface densely barbellate, apex densely shortly fimbriate; epichile deltoid, relatively small, glabrous, apex acute. Column ca. 4 mm, lower part enlarged, foot ca. 2 mm, column teeth deltoid, apex slightly obtuse; anther cap subspherical, densely finely papillate, front margin erose. Flowering : May-June.
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