虾尾兰 xia wei lan

Pteroceras elobe Seidenfaden, Bot. Tidsskr. 65: 149. 1969; Tuberolabium elobe (Seidenfaden) Seidenfaden.

Stems 2-12 cm, 4-5 mm in diam., internodes 5-8 mm. Leaves many; leaf blade oblong or falcate-oblong, 6-17 × 1.5-2.5 cm, acute. Inflorescences 2-8, borne opposite leaves, 8-23 cm, laxly many flowered; peduncle and rachis yellowish green, ca. 2 mm in diam., longitudinally ribbed; rachis 4-11 cm; floral bracts broadly ovate, ca. 1 mm. Flowers white, tinged with purplish on lip, spur white with purplish red tip; pedicel and ovary 8-10 mm. Sepals and petals thinly textured; dorsal sepal ovate-elliptic, ca. 4.5 × 2.7 mm, obtuse; lateral sepals obovate, rather large, ca. 5 × 3 mm, rounded. Petals obovate-elliptic, ca. 4 × 2.5 mm, obtuse; lip spurred, 3-lobed; lateral lobes ascending, suboblong, ca. 2 × 1 mm, obtuse; mid-lobe very small, ca. 0.4 mm, slightly fleshy, base with 2 calli on both sides; spur conic, ca. 2.5 mm, obtuse. Column ca. 1 mm, foot ca. 2.5 mm. Fl. Jul.

Epiphytic on tree trunks at forest margins; 1000-1500 m. Hainan, S Yunnan [Thailand, Vietnam].