双叶厚唇兰（中国高等植物图鉴）
Epigeneium rotundatum (Lindl.) Summerh. in Kew Bull. 13 (2): 264. 1957; Banerji et Thapa in J. Bomb. Nat. Hist. Soc. 67: 148. 1970; Tuyama in H. Hara, Fl. East. Himal. 2: 185. 1971; S. Y. Hu in Quart. J. Taiwan Mus. 26 (3, 4): 79. 1973; 中国高等植物图鉴 5: 707. 图8243. 1976; H. Hara et al., Enum. Flow.Pl. Nepal 1: 41. 1978; Seidenf. in Dansk Bot. Ark. 34 (1): 70. 1980; Z. H. Tsi in Acta Phytotax. Sin. 22 (6): 485. 1984; 西藏植物志 5: 868. 图481. 1987; Z. H. Tsi et S. C. Chen in Acta Phytotax. Sin. 33 (3): 292. 1995; 中国兰花全书: 58. 1998. ——Sarcopodium rotundatum Lindl., Fol. Orch. Sarcopodium: 2. 1853; Kraenzl. in Engler, Pflanzer. 45 (IV. 50, II. B. 21): 325. 1910.——Dendrobium rotundatum (Lindl.) Hook. f., Fl. Brit. Ind. 5: 712. 1890.
Lithophytic on rocks or epiphytic on tree trunks in open forests or at forest margins; 1300-2500 m. Guangxi, SE Xizang, NW and SE Yunnan [Bhutan, NE India, Myanmar, Nepal]. |
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Rhizome many branched, covered with papery tubular sheaths ca. 1 cm. Pseudobulbs borne 3-11 cm apart on rhizome, often ± curved, ascending, narrowly ovoid, 20-30 × 4-7 mm, 2-leaved, with scalelike basal sheaths. |
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Leaf blade oblong or elliptic, 6-9 × 1.5-2.5 cm, leathery, apex retuse; petiole 5-10 mm. Inflorescence 1-flowered; |
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peduncle ca. 5 mm, enclosed in large membranous sheaths; floral bracts ovate, small, ca. 1 cm, membranous. Flowers yellowish brown; pedicel and ovary ca. 2 cm. Dorsal sepal ovate-lanceolate, 22-32 × ca. 7 mm, acute; lateral sepals lanceolate, 22-35 × 8-10 mm. Petals oblong-lanceolate, ca. 23 × 5-6 mm, acuminate; lip obovate-oblong in outline, ca. 20 mm, 3-lobed; lateral lobes subovate; mid-lobe ca. 11 mm wide, adaxially with a triangular thickened keel, margin thin, undulate, subreniform to obscurely bilobed, emarginate; disk with 3 lamellae, median much shorter. Column ca. 1 cm, foot ca. 1 cm. Fl. Mar-May. |
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