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

5. Oreorchis erythrochrysea Handel-Mazzetti, Anz. Akad. Wiss. Wien, Math.-Naturwiss. Kl. 62: 252. 1925.

短梗山兰 duan geng shan lan

Plants 16-35 cm tall. Pseudobulbs broadly ovoid to suboblong, 0.8-2 × 0.7-1.3 cm, 2- or 3-noded, sometimes persisting and forming a chain of pseudobulbs connected by a short rhizome. Leaf solitary, dark green with longitudinal silvery stripes adaxially, narrowly elliptic to narrowly oblong-lanceolate, plicate, 7-14 × 1-2.3 cm, tapering at base into a distinct petiole-like stalk 2-4.5 cm, apex acuminate or acute. Inflorescence 12-35 cm, with 2 or 3 tubular sheaths below middle; rachis 3-11 cm, laxly to subdensely 8-25-flowered; floral bracts ovate-lanceolate, ca. 2 mm. Flowers yellow or greenish yellow, lip cream-colored and with purple or chestnut spots; pedicel and ovary 3-5 mm. Sepals narrowly oblong, 6-8 × 1.5-2 mm, apex obtuse or acute; lateral sepals slightly smaller than dorsal sepal, often slightly oblique. Petals narrowly oblong-spatulate, slightly falcate, 5.5-6.5 × ca. 1.5 mm, apex obtuse; lip suboblong-obovate, ca. 5 × 3 mm, shortly clawed at base, 3-lobed below middle; lateral lobes subovate to sublinear, 0.8-1 × ca. 0.7 mm, apex acute; mid-lobe subsquare or broadly elliptic-obovate, 2.5-3 × ca. 3 mm, margin slightly undulate, apex rounded and slightly emarginate; disk with a pair of short lamellae between bases of lateral lobes; lamellae less than 1 mm. Column slightly arcuate, ca. 3 mm, relatively thick. Fl. May-Jul.

● Forests, thickets, grassy alpine slopes; 2200-3700 m. SW Sichuan, SE Xizang, NW and SW Yunnan.


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