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FOC | Family List | FOC Vol. 25 | Orchidaceae | Thrixspermum

6. Thrixspermum formosanum (Hayata) Schlechter, Repert. Spec. Nov. Regni Veg. Beih. 4: 273. 1919.

台湾白点兰 tai wan bai dian lan

Sarcochilus formosanus Hayata, J. Coll. Sci. Imp. Univ. Tokyo 30(1): 336. 1911; Dendrocolla pricei Rolfe; Pteroceras pricei (Rolfe) Averyanov; Thrixspermum pricei (Rolfe) Schlechter; T. sasaoi Masamune.

Stems ascending, 1-2 cm, with several to many leaves. Leaves nearly basal, abaxially often spotted with purple, linear-lanceolate or narrowly oblong, usually 3-6 × 0.4-0.9 cm, slightly fleshy, acute, sometimes slightly bilobed. Inflorescence 4-6 cm; rachis short, slender; floral bracts dense, not distichous, broadly ovate-triangular, ca. 1 mm. Flowers fragrant, closely spaced, opening successively usually 1 or 2 at a time, lasting half a day, white, with brownish stripes on lip; pedicel and ovary 6-9 mm. Dorsal sepal oblong or elliptic, 5-7 × 2-3 mm, obtuse; lateral sepals obliquely obovate or ovate-elliptic, 5-7 × 3-4 mm, acute or obtuse. Petals falcate-oblong, 5-7 × 1.5-2.5 mm, obtuse or subtruncate; lip 4-5 mm, saccate at base, 3-lobed; lateral lobes erect, subovate, 2-3 mm, obtuse; mid-lobe inconspicuous; disk with long hairs and with a fleshy scalelike appendage; sac cylindric, ca. 6 mm, shallowly bilobed at apex. Column ca. 2 mm. Fl. Feb-Mar.

Epiphytic on trees or branches in forests; 500-1500 m. C and S Taiwan [N Vietnam].


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