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FOC | Family List | FOC Vol. 25 | Orchidaceae | Peristylus

2. Peristylus calcaratus (Rolfe) S. Y. Hu, Quart. J. Taiwan Mus. 26: 398. 1973.

长须阔蕊兰 chang xu kuo rui lan

Glossula calcarata Rolfe, Bull. Misc. Inform. Kew 1913: 145. 1913; Habenaria calcarata (Rolfe) Schlechter; H. lilungshania S. S. Ying; Platanthera pricei Hayata.

Plants slender, 17-48 cm tall. Tubers subglobose to oblong-ellipsoid, 0.8-2 × 0.5-1.5 cm. Stem with 2-4 tubular sheaths at base, 3-5-leaved. Leaves clustered near base to somewhat spaced along stem, elliptic-lanceolate, 2.5-12 × 0.6-3.5 cm, base attenuate, apex acute to obtuse. Inflorescence 13-38 cm; peduncle cylindric, slender; sterile bracts few, lanceolate, to 2 cm; rachis 6-23 cm, laxly to subdensely many flowered; floral bracts ovate-lanceolate, 6-11 mm, shorter than to slightly exceeding ovary, apex acuminate. Flowers erect, pale yellowish green; ovary 7-9 mm including pedicel. Dorsal sepal erect, oblong-ovate, concave, 2-3 × ca. 1.5 mm, 1-veined, apex obtuse; lateral sepals spreading, oblong, 3-3.5 × ca. 1.2 mm, slightly narrower than dorsal sepal, apex obtuse. Petals connivent with dorsal sepal and forming a hood, ovate-oblong, oblique, 3-3.5 × 1.5-2 mm, 1- or 2-veined, apex obtuse; lip narrowly oblong, 3-3.5 × ca. 0.5 mm, divided near base by a transverse ridge into a short, concave hypochile and a longer, deflexed, deeply 3-lobed epichile, ecallose; lateral lobes spreading at right angles to axis of lip, horizontal or ascending, filiform, 8-15 mm; mid-lobe narrowly oblong-lanceolate, 2-3 mm, apex obtuse; spur pendulous, fusiform, 3-5 mm, apex obtuse or sometimes shallowly 2-lobed. Column ca. 1 mm; viscidia ellipsoid. Fl. Jul-Oct.

Forests, grassy slopes; 200-1300 m. Guangdong, Guangxi, Hunan, Jiangsu, Jiangxi, Taiwan, W Yunnan, Zhejiang [Vietnam].


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