粗脉石仙桃（新拟）
柱茎石仙桃（植物分类学报）
Pholidota bracteata (D. Don) Seidenf. in Opera Bot. 89: 100. fig. 57. 1986, et 114: 123. 1992. ——Ptilocnema bracteatum D. Don, Prodr. Fl. Nepal. 33. 1825. ——Pholidota pallida Lindl. in Bot. Reg. 21: sub t. 1777. 1835. ——Pholidota yunnanensis Schltr. in Fedde Repert. Sp. Nov. 19: 378. 1924, non Rolfe. ——Pholidota yunpeensis H. H. Hu in Rhodora 27: 107. 1925.
Epiphytic on tree trunks in forests; 800-2700 m. S and SW Yunnan [Bhutan, NE India, Laos, Myanmar, Nepal, Thailand, Vietnam]. E. F. de Vogel (1988) 根据D. Don描述Ptilonema bracteatum的叶革质而认定应为Pholidota imbricata,故起用P. pallida Lindl.。而Seidenf aden (1992) 仍坚持用P. bracteata。这里暂用Seidenfaden的观点，因为对叶片质地的描述未必可靠。 |
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Rhizome short, 5-6 mm in diam., densely covered with scaly sheaths, with many roots. Pseudobulbs contiguous, nearly narrowly oblong, 1.8-6 cm × 6-11 mm, slightly obtusely 4-ridged, apex 1-leaved. |
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Leaf blade narrowly elliptic-oblanceolate to narrowly oblong-oblanceolate, 10-23 × 2.3-5.5 cm, papery, apex acute or acuminate and mucronate; petiole 1-4 cm. |
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Inflorescence arising from young pseudobulbs, with nearly mature or immature leaf at anthesis, 10-25 cm; rachis nodding, densely many flowered; floral bracts broadly ovate-sagittate, conduplicate, concave, 3-5 mm, pubescent on margin, with many somewhat loosely arranged veins, acute to obtuse. Flowers white, slightly tinged with reddish; pedicel and ovary 3-4 mm. Dorsal sepal broadly elliptic, concave, 4-5 × 2.5-3 mm, dorsally carinate, apex acute; lateral sepals broadly ovate-oblong, oblique, 5-6 × 3-3.5 mm, dorsally carinate, ± connate at base. Petals ovate-elliptic, ca. 4 × 2-2.5 mm; lip shallowly saccate, 4-6 mm, 3-lobed; lateral lobes ovate, 1.5-2 mm; mid-lobe transversely oblong, ca. 3 × 4 mm, apex emarginate; saccate disk with 2 or 3 thick veins near base. Column ca. 3 mm, both sides with wings; wings above middle broader and nearly orbicular in ventral view. Capsule subobovoid, ca. 1 cm × 6 mm; fruiting pedicel 2-3 mm. Fl. Jun-Jul, fr. Oct. 2n = 40. |
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果：蒴果近倒卵形，长约1厘米，宽约6毫米；果梗长2-3毫米。
果期：10月。 | ||
