尾尖石仙桃（横断山区维管植物）
Pholidota protracta Hook. f. in Hook. Icon. Pl. 19: t. 1877. 1889. et Fl. Brit. Ind. 5: 845. 1890; King et Pantl. in Ann. Bot. Gard. Calcutta 8: 146. Pl. 203. 189; Tuyama in H. Hara, Fl. East. Himal. 448. 1966, et 2nd Rep. 193. 1971; E. F. de Vogel in Orchid Monogr. 3: 56. 1988;横断山区维管植物2: 2577. 1994.
Epiphytic on trees in broad-leaved evergreen forests or on cliffs along valleys; 1800-2700 m. SE Xizang, NW Yunnan [Bhutan, NE India, Myanmar, Nepal]. |
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Rhizome subcylindric, 2.5-3.5 mm in diam., slender, usually with long internodes, apex producing a pseudobulb and with a new rhizome at its base. Pseudobulbs borne 2-4 cm apart from each other, subcylindric, 1.7-4.5 cm × 2.5-5 mm, attenuate toward apex, ± curved, apex 2-leaved. |
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Leaf blade narrowly elliptic-lanceolate, 7.3-12.5 × 1.3-2.3 cm, papery, base broadly cuneate, apex acuminate or nearly caudate; petiole 3-12 cm. |
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| Inflorescence arising from rhizome near base of last pseudobulb, 1.5-3 cm; rachis 3-7-flowered; floral bracts persistent at least at end of flowering, broadly ovate, ca. 3 mm. Flowers pale yellow, small; pedicel and ovary 5-7 mm. Sepals ovate-oblong, ca. 4 × 2.5 mm, 3-veined; lateral sepals slightly oblique. Petals narrowly obovate, ca. 3 × 1.8 mm; lip subovate-oblong in outline, ca. 4 × 3 mm, shallowly cupular at base, slightly 3-lobed, apex emarginate, without appendages inside. Column ca. 3.5 mm, both sides winged; wings widened toward column apex; rostellum ca. 1.3 mm wide. |
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| Capsule obovoid-ellipsoid, ca. 1 cm × 6 mm, 3-ridged; fruiting pedicel 4-5 mm. Fl. Oct. 2n = 40. |
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