菲律宾线柱兰 fei lü bin xian zhu lan

Adenostylis philippinensis Ames, Schedul. Orchid. 6: 9. 1923.

Plants slender, ca. 10 cm tall. Rhizome elongate. Stem ascending, pale red-brown, 2-4-leaved. Leaves adaxially green, midrib white with dark green reticulation, triangular-lanceolate, 3.2-6 × 1.4-2.3 cm, 5-veined, apex acuminate; petiole ca. 1.5 cm. Inflorescence ca. 17 cm, hairy, with 5 sterile bracts; rachis ca. 8 cm, 13-flowered; floral bracts hairy. Flowers half opening, resupinate; ovary sparsely hairy. Sepals hairy abaxially; dorsal sepal concave, light brown, ovate, ca. 5 mm; lateral sepals dark green, ovate-lanceolate, ca. 4 mm. Petals white, falcate, ca. 4.5 mm; lip white, ca. 4 mm, obscurely 3-partite; hypochile ventricose-saccate, ca. 1.7 mm wide, inside containing 2 digitate calli; mesochile short; epichile dilated, reflexed, transverse-oblong or subreniform, ca. 1.7 mm wide, nearly entire at apex. Column ca. 2.2 mm. Fl. Feb-Mar.

Forests; ca. 200 m. S Taiwan [Philippines].