足柱兰 zu zhu lan

Dendrochilum formosanum (Schlechter) Schlechter; D. uncatum var. formosanum (Schlechter) T. Hashimoto; Platyclinis formosana Schlechter.

Pseudobulbs ± clustered, narrowly ellipsoid or narrowly ovoid, 2-4 × 1-1.5 cm, usually shiny. Leaf blade narrowly elliptic to linear-oblong, 8-15 × 1.5-3 cm, base cuneate, apex acuminate or acute; petiole 1-4 cm. Inflorescence 10-15 cm, together with young pseudobulb and leaf, arising from rhizome near base of last pseudobulb, arching or nodding, slender; rachis often slightly flexuose, 20-30-flowered; floral bracts ovate, 3-4 mm. Flowers distichous, yellowish; pedicel and ovary ca. 3 mm. Sepals narrowly elliptic or oblong, 6-7 × 2-4 mm. Petals oblong or elliptic, 5-6 × 2-3 mm; lip lyrate, ca. 5 × 3 mm, shortly clawed at base, 3-lobed; lateral lobes lunate, very small; mid-lobe obovate, ca. 3.3 × 2.5 mm; disk with 2 short longitudinal ridges near base. Column ca. 2 mm, stelidia arising from middle. Capsule globose, less than 1 cm in diam. 2n = 30.

Epiphytic on trees in broad-leaved forests or thickets; 500-1000 m. S Taiwan [Philippines].