齿突羊耳蒜 chi tu yang er suan

Liparis diodon H. G. Reichenbach.

Herbs, terrestrial. Pseudobulbs ovoid, very small, ± enclosed by white membranous sheaths. Leaves 2; petiole sheathlike, 1-2 cm or longer, amplexicaul, not articulate; blade ovate, 3-3.5(-7.5) × 1.5-2.5 cm, membranous or herbaceous, base contracted and decurrent into petiole, margin entire, apex acute or obtuse. Inflorescence ca. 5 cm; peduncle cylindric, slightly compressed, narrowly winged on either side; rachis several flowered; floral bracts ovate, ca. 1.5 mm. Flowers green or yellowish green; pedicel and ovary 5-10 mm. Sepals narrowly oblong-lanceolate or narrowly oblong, (5-)10-12 × ca. 2 mm, 3-veined, apex obtuse; lateral sepals somewhat oblique. Petals filiform or narrowly linear, 5-7 × ca. 0.3 mm, 1-veined; lip broadly obovate-obcordate (elliptic-obovate in material from Yunnan), 5-7 × 4-5 mm, base contracted, without a callus, margin irregularly toothed, apex mucronate. Column slightly arcuate, 3-3.5 mm, with 2 thick dentate projections on ventral side, base dilated, apex winged. Fl. Jul. 2n = 28, 30.

Soil-covered rocks in Tsuga forests along valleys; 2600-2700 m. S Xizang, Yunnan [N India, Nepal].