Phreatia formosana Rolfe ex Hemsley Ann. Bot. (Oxford). 9: 156. 1895.

馥兰 fu lan

Octarrhena formosana (Rolfe ex Hemsley) S. S. Ying; O. kotoinsularis (Fukuyama) S. S. Ying; Phreatia evrardii Gagnepain; P. kotoinsularis Fukuyama.

Stems tufted, very short, not pseudobulbous, enclosed in leaf sheaths. Leaves subbasal, 4-6(-10), distichous on short stem; leaf blade linear, 7-13 × 0.8-1 cm, base slightly contracted and dilated into equitant sheaths, articulate, apex obtuse or retuse. Inflorescence axillary, erect, 6-7 cm, slender, with 3 ovate-lanceolate sheaths below middle; rachis 2-5 cm, many flowered; floral bracts subovate, 1-1.5 mm. Flowers white or greenish white, ca. 2 mm in diam.; pedicel and ovary 2-3 mm. Dorsal sepal elliptic-ovate, ca. 1.5 × 1 mm, obtuse; lateral sepals obliquely ovate-triangular, ca. 1.5 × 1.5 mm. Petals subelliptic, ca. 1 × 0.6 mm; lip suboblate, ca. 1 × 1.3 mm, base with a short claw and slightly saccate. Column short, foot distinct. Capsule ellipsoid, ca. 3 × 1.5 mm. Fl. Aug, fr. Sep-Oct.

Epiphytic on trees in open places of forests; 800-1800 m. C and S Taiwan, S Yunnan [Thailand, Vietnam].