球茎石豆兰（植物分类学报）
Bulbophyllum triste Rchb. f. in Walp. Ann. Bot. Syst. 6: 253. 1861; Hook. f., Fl. Brit. Ind. 5: 768. 1890; King et Pantl. in Ann. Bot. Gard. Calcutta 8: 73, pl. 98. 1898; Stapf. in Bot. Mag. 148: t. 8943. 1922; Tuyama in H. Hara, Fl, East. Himal.: 424. 1966; H. Hara et al., Enum. Flow. Pl. Nepal 1: 34. 1978; Seidenf. in Dansk Bot. Ark. 33 (3): 213, fig. 156. 1979.
Fl. Jan-Feb. 2n = 38. Tree trunks in forests; 800-1800 m. S Yunnan [India, Myanmar, Nepal, Thailand]. |
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Rhizome stout, 2-3 mm in diam. |
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Pseudobulbs ca. 5 mm apart on rhizome, subglobose, broader than long, 13-20 mm in diam., apex with 2 leaves. |
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Leaf deciduous at anthesis, subsessile; blade pale green, ± lanceolate, ca. 10 × 2 cm, apex acute. |
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Scape arising from base of leafless pseudobulb, 2-4 cm; raceme sometimes nodding, 1-1.5 cm, densely many flowered; peduncle ca. 1 mm in diam., with 2 or 3 sheaths 5-6 mm; floral bracts 2-3 mm, apex acute. Pedicel and ovary ca. 2 mm. Flowers pale purplish red, marked with purple spots. Dorsal sepal ovate, concave, ca. 4 × 2.2 mm, glabrous, entire, acute; lateral sepals adnate to column foot, ovate, ca. 5 × 2.2 mm, glabrous, their lower edges connate to each other, entire, acute. Petals triangular, ca. 2.2 × 1.2 mm, base ca. 1/2 width adnate to column foot, margin entire, apex acute; lip ligulate, ca. 3.2 mm, ± fleshy, base grooved, attached to end of column foot by an immobile joint, margin decurved. Column ca. 2 mm; foot ca. 1.5 mm, with free part ca. 1 mm; stelidia narrowly lanceolate, ca. 0.6 mm; anther cap slightly and minutely papillate.
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