刀叶石斛（中国高等植物图鉴）
Dendrobium terminale Par. et Rchb. f. in Trans. Linn. Soc. 30: 149. 1874; Hook. f., Fl, Brit. Ind. 5: 725. 1890; King et Pantl. in Ann. Bot. Gard. Calcutta 8: 42, pl. 55. 1898; Kraenzl. in Engler, Pflanzenr. 45 (IV. 50, II. B. 21): 713. 1910; 中国高等植物图鉴 5: 705. 图8239. 1976.; Z. H. Tsi in Acta Phytotax. Sin. 18 (4): 433. 1980; Seidenf. in Opera Bot. 83: 219, fig. 148. 1985; Averyanov, Vasc. Pl. Syn. Vietnam. Fl. 1: 81. 1990; Seidenf. et J. J. Wood, Orch. Penins. Malay. Singap.: 415. 1992; Seidenf., l. c. 114: 251. 1992; Ave-ryanov, Iden. Guide Vietnam. Orch.: 216. 1994.
Epiphytic on tree trunks at forest margins, lithophytic on rocks in mountain valleys; 800-1100 m. S Yunnan (Mengla) [NE India, Malaysia, Myanmar, Thailand, Vietnam].
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Stems erect, sometimes upper part branched, compressed trilateral, 10-23 cm, with leaf sheaths ca. 5 mm in diam., base contracted, with many nodes, internodes ca. 1 cm. |
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Leaves distichous, sparsely overlapping, ascending, laterally compressed and dagger-shaped, 3-4 × 0.6-1(or more) cm, thickly leathery or fleshy, apex acute. |
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Inflorescence subterminal; peduncle very short; basal sheaths several, membranous; floral bracts small. Pedicel and ovary ca. 7 mm, slender. Flowers small, pale yellowish white. Dorsal sepal ovate-oblong, 3-4 × ca. 1.4 mm, 3-veined, subacute; lateral sepals obliquely ovate-triangular, ca. 4 mm, 3- or 4-veined, base very oblique, margin close to column, apex acute; mentum narrowly long, ca. 7 mm. Petals oblong, ca. 10 × 15 mm, 1-veined, apex subobtuse; lip adnate to apex of column foot, subspatulate, ca. 10 × 7 mm, adaxially with thickened callus or crestlike protrusion near apex, front margin undulate, apex 2-lobed. Column ca. 1 mm; anther cap truncate and denticulate at apical margin.
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