苏瓣石斛(植物分类学报)
Dendrobium harveyanum Rchb. f. in Gard. Chron. n. s., 19: 624. 1883; Hook. f., Fl. Brit. Ind. 5: 747. 1890; Kraenzl. in Engler, Pflanzenr. 45 (IV. 50, II. B. 21): 42. 1910; Seidenf. in Opera Bot. 83: 35, fig. 14. 1985; Averyanov, Vasc. Pl. Syn. Vietnam. Fl. 1: 73. 1990; Seidenf., l. c. 114: 227. 1992; Averyanov, Iden. Guide Vietnam. Orch.: 191. 1994; Z. H. Tsi et S. C. Chen in Acta Phytotax. Sin. 33 (3): 291. 1995; Z. H. Tsi, S. C. Chen et K. Mori, Wild Orch. China: 75, pl. 90. 1997; 中国兰花全书: 164. 图6-14 (6). 1998.
Epiphytic on tree trunks in open forests; 1100-1700 m. S Yunnan (Mengla) [Myanmar, N Thailand, Vietnam].
This species is similar to Dendrobium brymerianum Rchb.f. The difference is that the stem of this species has most twisted longitudinal ribs, the inflorescence comes from the stem with leaves, the petal edge is densely grown tassel, and the lip edge has short tassel, which is easy to distinguish. | ||
Stems fusiform, usually curved, 8-16 cm, 8-12 mm in diam., rigid, unbranched, with 3-9 nodes, internodes 1.5-2.5 cm, with many twisted longitudinal ridges, brownish yellow when dry, glossy. | ||
Leaves often 2 or 3, on upper part of stem, ascending, oblong or narrowly oval-oblong, 10.5-12.5 × 1.6-2.6 cm, leathery, base contracted, with clasping leathery sheath, apex acute. | ||
Inflorescence subterminal on previous year’s or older leafy stem, pendulous, 3.5-9 cm, slender, laxly few flowered; peduncle with basal sheaths 3 or 4, ovate; floral bracts ovate-triangular, ca. 1 mm. Pedicel and ovary ca. 2.5 cm. Flowers spreading, thinly textured, golden yellow. Dorsal sepal lanceolate, ca. 12 × 5-6(or more) mm, 5- or 6-veined, slightly obtuse; lateral sepals ovate-lanceolate, ca. 12 × 7 mm, 7-veined, apex slightly obtuse; mentum subglobose, ca. 3 mm. Petals oblong, ca. 12 × 7 mm, 3-veined, margin densely long fimbriate, apex obtuse; lip suborbicular, concave, ca. 2 cm wide, base narrowed into a short claw, margin compoundly fimbriate; disk densely shortly villous. Column ca. 4 mm; anther cap subconic, ± glabrous, front margin irregularly dentate, apex obtuse. Flowering March-April.
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