海南石斛（海南植物志）
Dendrobium hainanense Rolfe in Kew Bull.: 193. 1896, et in J. Linn. Soc. Bot. 36: 11. 1903; Schltr. in Fedde Repert. Sp. Nov. Beih. 4: 210. 1919; S. Y. Hu in Quart. J. Taiwan Mus. 26 (1, 2): 155. 1973; 海南植物志 4: 221. 1977; Z. H. Tsi in Acta Phytotax. Sin. 18 (4): 433. 1980; Averyanov, Vasc. Pl. Syn. Vietnam. Fl. 1: 73. 1990, et Iden. Guide Vietnam. Orch.: 213. 1995.
On tree trunks in broad-leaved forests; 1000-1700 m. Hainan.
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Stems rigid, ascending, compressed cylindric, slightly falcate, 10-30(-45) cm, 2-3 mm in diam., not branched, with many nodes, leafy throughout, internodes slightly clavate, ca. 1 cm. |
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Leaf blade subcylindric, almost subulate, slender, 2-2.5(-5.5) × 0.1-0.3 cm, thickly fleshy, apex obtuse. |
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Inflorescence arising from upper part of leafless stem, usually 1-flowered; floral bract ovate, ca. 1 mm, membranous. Pedicel and ovary ca. 6 mm, slender. Flower small, white with yellow spot on disk of lip. Dorsal sepal ovate, 3.3-4 × ca. 2.5 mm, 3-veined, apex subobtuse; lateral sepals ovate-triangular, 3.3-4 × ca. 3.5 mm, 3-veined, base oblique, apex acute; mentum ca. 10 mm. Petals narrowly oblong, 3.3-4 × ca. 1 mm, 1-veined, apex acute; lip obovate-triangular, ca. 15 × 7 mm, base clawed, apical margins undulate, apex emarginate; disk smooth. Column 1-1.5 mm, with a foot ca. 1 cm; anther cap semiglobose, glabrous. Fl. Sep-Oct. |
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