大喙兰 da hui lan

Sarcanthus smithianus Kerr, J. Siam Soc., Nat. Hist. Suppl. 9: 239. 1933; Sarcoglyphis yunnanensis Z. H. Tsi.

Stems 2-5 cm, enclosed in persistent leaf sheaths. Leaves narrowly oblong or slightly falcate-oblong, 11-19 × 1.5-2 cm, obtuse and unequally bilobed. Inflorescence racemose, rarely paniculate, pendulous, longer than leaves, many flowered; peduncle with 3 or 4 bractlike sheaths; rachis slender; floral bracts ovate, small, ca. 1 mm, acute. Flowers small, white, tinged with purple, lip purple; pedicel and ovary 5-8 mm. Dorsal sepal oblong, cymbiform, ca. 4.5 × 3 mm, obtuse; lateral sepals obliquely ovate, ca. 4.5 × 3.5 mm, obtuse. Petals oblong, ca. 4 × 1.2 mm, obtuse; lip spurred, 3-lobed; lateral lobes erect, subtriangular, apex rounded; mid-lobe slightly fleshy, middle dilated and transversely oblong, beaked toward apex; spur subconic, ca. 3 mm, apex obtuse, interior slightly septate, with a laterally compressed callus on back wall; callus deeply grooved centrally, with 2 small hornlike projections, base densely minutely papillate. Column ca. 1.5 mm; rostellum ± oblong, ca. 1.5 mm. Fl. Apr.

Epiphytic on tree trunks in evergreen broad-leaved forests; 500-700 m. S Yunnan [Laos, Thailand, N Vietnam].