3. Conchidium rhomboidale (Tang & F. T. Wang) S. C. Chen & J. J. Wood, Fl. China. 25: 347. 2009.
菱唇蛤兰 ling chun ge lan
Basionym: Eria rhomboidalis Tang & F. T. Wang, Acta Phytotax. Sin. 1: 86. 1951.
Rhizome slender, 1-2 mm in diam. Pseudobulbs borne 2-4 cm apart from each other, oblong-cylindric, 0.9-1.5 cm × 4-6 mm, apex 2-leaved. Leaves shortly petiolate, narrowly elliptic or ovate-elliptic, 2-6 × 0.6-1.5 cm, apex acute and apiculate. Inflorescence subterminal, on outer side of leaves, ca. 2.5 cm, 1-flowered, with 1 or 2 sheaths at base; floral bracts ovate, ca. 1 mm, acute. Flowers cream-colored and lavender or red; pedicel and ovary ca. 1 cm. Dorsal sepal elliptic, ca. 11 × 4 mm, obtuse; lateral sepals ovate-lanceolate or triangular, oblique, ca. 18 × 6-7 mm, obtuse; mentum ca. 6 mm. Petals slightly curved, oblong-lanceolate, ca. 10 × 3 mm, obtuse; lip subrhombic, 10-17 × 7-10 mm, base narrowed into a claw, apical quarter 3-lobed; lateral lobes oblong, margins slightly obtusely toothed or entire; mid-lobe trapezoid, ca. 4 × 5-6 mm, barbate on adaxial veins, margin irregularly dentate, subtruncate; disk with 2 lamellae extending from base to near base of mid-lobe. Column ca. 4 mm, foot ca. 8 mm. Fl. Apr-May.
● On rocks in forests; 700-1300 m. SW Guangxi, SW Guizhou, Hainan, SE Yunnan [?Vietnam].