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181. Pteroceras Hasselt ex Hasskarl, Flora. 25(2, Beibl.): 6. 1842.

长足兰属 chang zu lan shu

Authors: Xinqi Chen & Jeffrey J. Wood

Herbs, epiphytic, small, monopodial. Stems mostly short. Leaves few to ca. 10, ± distichous, flat, lorate, jointed and amplexicaul-sheathing at base, apex usually unequally bilobed. Inflorescences solitary to several, lateral or axillary, penetrating leaf sheaths, erect or pendulous, racemose, with a few to many spirally or distichously alternating flowers. Flowers usually resupinate, small. Sepals and petals free, spreading; lateral sepals often oblique and distinctly broader than petals, not adnate to column foot. Petals narrower than sepals; lip hinged to end of column foot by a movable joint, 3-lobed; lateral lobes erect, rather long; mid-lobe very short and small, fleshy, base spurred; spur or sac pointing forward in line with column foot, without interior ornaments, although front wall sometimes quite fleshy. Column short and stout, with a long foot; rostellum small, 2-lobed; pollinia 2, waxy, subglobose, cleft, attached by a common suboblong stipe to a ± triangular viscidium.

About 20 species: from NE India to Indonesia (Maluku); two species (one endemic) in China.

The genus Pteroceras has been monographed by Pedersen (Opera Bot. 117: 1-64. 1993).

Pteroceras simondianum (Gagnepain) Averyanov (Bot. Zhurn. (Moscow & Leningrad) 73: 432. 1988; Ornithochilus simondianus Gagnepain, Bull. Mus. Natl. Hist. Nat., sér. 2, 22: 632. 1951) was erroneously recorded from Yunnan by Y. M. Shui and W. H. Chen (Seed Pl. Karst Region China 1: 250. 2006). The record was based on a misidentified specimen.

1 Surface of peduncle glabrous and smooth; stems 2-14 cm; ovary strongly 3-keeled.   1 P. leopardinum
+ Surface of peduncle densely black hispid; stems 1.5-4.6 cm; ovary terete.   2 P. asperatum

Lower Taxa


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