2. Holcoglossum subulifolium (H. G. Reichenbach) Christenson, Notes Roy. Bot. Gard. Edinburgh. 44: 255. 1987.
凹唇槽舌兰 ao chun cao she lan
Vanda subulifolia H. G. Reichenbach, Flora 69: 552. 1886; Holcoglossum auriculatum Z. J. Liu, S. C. Chen & X. H. Jin; V. watsonii Rolfe.
Plants ascending. Stems 2-20 cm. Leaves often 3-5; blade nearly subterete, 5-14 cm × ca. 3 mm, fleshy, adaxially channeled, apex acute. Inflorescence ascending, arching, ca. 14 cm, several flowered; floral bracts ovate, ca. 5 mm. Flowers opening widely, white, thinly textured, lateral lobes of lip brownish yellow, tinged with pale purple, mid-lobe with yellowish brown ridges, anther cap pale yellow; pedicel and ovary white, tinged with purple, 2-3 cm. Dorsal sepal suboblong, ca. 17 × 6 mm, base contracted, apex acute; lateral sepals falcate-oblong, ca. 19 × 7 mm. Petals oblong-lanceolate, slightly smaller than dorsal sepal; lip spurred, 3-lobed; lateral lobes erect, triangular, acute; mid-lobe broadly triangular, ca. 12 × 10 mm, concave or shallowly cucullate, base with 3 ridges, margin incurved, undulate and irregularly denticulate; spur conic, 2-3 mm, obtuse. Column 4-5 mm, foot very short; anther cap slightly narrowed toward apex. Fl. Mar-May.
Epiphytic on tree trunks in broad-leaved evergreen forests; 1300-2200 m. SW Hainan, SE Yunnan (Malipo) [Myanmar, Thailand, Vietnam].