一掌参（中国高等植物图鉴）
Peristylus forceps Finet in Rev. Gen. Bot. 13: 521, t. 16. 1901; Seidenf. in Dansk Bot. Ark. 31(3): 60, fig. 32. 1977;西藏植物志5: 722. 1987; K. Y. Lang in Acta Phytotax. Sin. 25(6): 453. 1987;横断山区维管植物2: 2541. 1994. ——Herminium forceps(Finet) Schltr. in Notes Bot. Gard. Edinb. 24: 97. 1912;中国高等植物图鉴5: 624, 图8077. 1976.——Habenaria forceps(Finet)Schltr. in Fedde Repert. Sp. Nov. Beih. 4: 127. 1919.——Habenaria herminioides Ames et Schltr. , 1. c. ——Herminium tsoongii T. Tang et F. T. Wang in Contr. Inst. Bot. Nat. Acad. Peiping 2: 134. 1934.
Abies forests, Quercus forests along valleys, grassy slopes; 1200-4000 m. S Gansu, Guizhou, W Hubei, Sichuan, SE Xizang, Yunnan. |
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Plants slender, 15-45 cm tall. Tubers ovoid-oblong, ca. 1 cm. Stem with 2 or 3 tubular sheaths at base, 2-5-leaved. |
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Leaves widely spaced along stem, elliptic-lanceolate to lanceolate, 4-10 × 0.8-2 cm, apex acute or acuminate, intergrading into sterile bracts above. |
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Inflorescence 10-30 cm; peduncle cylindric, slender; sterile bracts several, often foliaceous, lanceolate, to 35 mm; rachis 8-18 cm, densely many flowered; floral bracts ovate-lanceolate, ca. 8 mm, exceeding flower, apex acuminate. Flowers horizontal, green; ovary ca. 5 mm including pedicel, glabrous to slightly pubescent. Dorsal sepal erect, ovate, 2-3 × ca. 2 mm, 3-veined, apex obtuse; lateral sepals spreading, oblong, slightly oblique, 2-3 × ca. 1.5 mm, 1- or 3-veined, apex obtuse. Petals ovate-lanceolate, slightly oblique, 2-3 × ca. 1.5 mm, fleshy above middle, 1-veined, apex obtuse; lip deflexed, ligulate-lanceolate, entire, 2.5-3.5 × 1.5-1.8 mm, sometimes abruptly narrowed above middle, abaxially carinate, ecallose, margin incurved, apex obtuse; spur pendulous, obovoid, 0.7-1 mm, much shorter than ovary, apex obtuse. Column ca. 0.8 mm; viscidia disklike; rostellum with short arms. Fl. Jun-Aug. |
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