二叶石豆兰（中国高等植物图鉴）
Bulbophyllum shanicum King et Pantl. in J. Asiat. Soc. Bengal. 66: 587. 1897; Seidenf. in Dansk Bot. Ark. 33 (3): 210, fig. 154. 1979. ——B. suavissimum auct. non Rolfe: 中国高等植物图鉴 5: 732. 图8294. 1976.
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Rocks in forests; 1800-1900 m. SW Yunnan [Myanmar]. |
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Rhizome creeping, ca. 3 mm in diam., densely with tubular sheaths, rooting from base of pseudobulbs. Pseudobulbs 1-2 cm apart from each other, ovoid, 7-14 mm in diam., with 2 leaves at apex. |
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Leaves deciduous at anthesis, subsessile; leaf blade obovate-lanceolate, 3-7 × 1-2.1 cm, leathery, apex rounded and emarginate. |
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Scape from base of leafless pseudobulb, erect, 11-17 cm; raceme 6-10 cm, densely with many secund flowers, peduncle ca. 1.5 mm in diam., glabrous, with 5 tubular sheaths; floral bracts lanceolate, small, ca. 3 mm, apex acuminate. Pedicel and ovary 4-5 mm. Flowers pale yellow. Sepals free, ovate-lanceolate, 3-veined, apex obtuse; dorsal sepal ca. 4.5 × 1.6 mm; lateral sepals ca. 5.5 × 3 mm, base ca. 1/2 width adnate to column foot. Petals ovate-lanceolate, ca. 4 × 1.3 mm, entire, acute or mucronate; lip reflexed, ± conduplicate, ca. 3 mm, fleshy, adaxially with 1 longitudinal keel, apex obtuse, ciliate. Column ca. 1.8 mm; foot ca. 1.5 mm, with free part ca. 0.3 mm; stelidia deltoid, ca. 0.8 mm; anther cap densely finely papillate, centrally with 1 globose projection. Fl. Oct. |
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