二尾兰 er wei lan

Vrydagzynea albida Blume var. formosana (Hayata) T. Hashimoto; V. formosana Hayata.

Plants terrestrial, 5-18 cm tall. Leaves 5-7, deep green, ovate to ovate-elliptic, 2-3.5 × 0.7-2.5 cm, base broadly truncate or subrounded, apex acute; petiole-like base 1-1.5 cm. Rachis 2-5 cm, 3-10-flowered, pubescent; floral bracts triangular to ovate-lanceolate, 8-9 × 3.5-4 mm, abaxially pubescent, apex acuminate. Flowers white or greenish white; ovary and pedicel 6-8 mm. Sepals white or pale green, abaxially pubescent at base, fleshy at apex; dorsal sepal narrowly ovate-oblong, cymbiform, 5-6 × 1.5-2.5 mm, apex obtuse; lateral sepals ovate-lanceolate, oblique, 5-6 × 2-3 mm, apex obtuse. Petals white, linear to narrowly ovate, 4.5-5 × 0.8-2.3 mm, apex obtuse; lip white, erect, oblong-elliptic or obovate, concave, 3-4 × 2.5-3.5 mm, apex rounded-bifid; spur pendulous, parallel to ovary, conic-cylindric, 4-5 × 1.5-2.5 mm, apex obtuse and shallowly 2-lobed. Column erect, 3-lobed, ca. 2 mm; rostellum flat, apex forming a viscidium. Fl. Mar-May.

Damp forests and humid places along valleys; 300-700 m. Hainan, Hong Kong, C and N Taiwan [Indonesia (Java), Malay Archipelago (Borneo)].