齿唇沼兰 chi chun zhao lan

Microstylis orbicularis W. W. Smith & Jeffrey, Notes Roy. Bot. Gard. Edinburgh 9: 111. 1916; Malaxis orbicularis (W. W. Smith & Jeffrey) Tang & F. T. Wang; Microstylis tenebrosa Rolfe ex Downie.

Plants terrestrial. Pseudobulbs ovoid, ca. 1 cm × 7-8 mm, ± enclosed in white membranous sheaths. Leaves often 3, ovate-lanceolate, oblong-lanceolate, or ovate, 4.5-13 × 1.8-4.8 cm, base contracted into a sheathlike, amplexicaul petiole 2.5-6 cm, apex acuminate or long acuminate. Inflorescence erect; peduncle 14-40 cm, wingless; rachis 5-9 cm, usually more than 10-flowered; floral bracts reflexed, linear-lanceolate, 5-7(-10) mm. Flowers dark purple or blackish purple, 6-7 mm in diam.; pedicel and ovary 5-6 mm. Dorsal sepal oblong or broadly linear, 5-6 × 1.2-1.5 mm, margin often revolute, apex obtuse; lateral sepals nearly broadly oblong, ca. 3.5 × 2 mm, base slightly oblique, apex obtuse. Petals narrowly linear, ca. 5 × 0.6 mm; lip superior, suborbicular or broadly obovate-elliptic in outline, 7-8 × ca. 5 mm, apical margin with 15-20 fimbriate teeth 0.5-1 mm, with a central depression; auricles ovate-triangular to narrowly ovate, 3.5-4 mm, surrounding column. Column ca. 1 mm, stout. Fl. Jun. 2n = 40*.

● Forests; 800-2100 m. S and SW Yunnan.