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

2. Thrixspermum pensile Schlechter, Bot. Jahrb. Syst. 45(Beibl. 104): 59. 1911.

垂枝白点兰 chui zhi bai dian lan

Aporum pendulicaule (Hayata) Rauschert; Dendrobium pendulicaule Hayata; Thrixspermum pendulicaule (Hayata) Schlechter.

Stems pendulous, compressed, 30-90(-200) cm, leafy throughout, internodes ca. 2 cm. Leaves elliptic, 5-7 × 2-2.7 cm, thick, slightly fleshy, conduplicate toward base, apex acute. Inflorescence 1-2 cm, few flowered; floral bracts persistent, not distichous, ovate-triangular, 2-3 mm. Flowers lasting only half a day, white, ca. 1.3 cm in diam.; sepals and petals often tinged with yellowish or greenish abaxially, lip spotted orange-yellow; pedicel and ovary 8-9 mm. Dorsal sepal elliptic-ovate, ca. 9 × 4-5 mm, concave, obtuse; lateral sepals slightly wider than dorsal sepal. Petals elliptic, ca. 9 × 3.5 mm; lip deltoid, saccate, ca. 6 × 9 mm, concave, 3-lobed; lateral lobes erect, triangular-falcate; mid-lobe very small, slightly fleshy, with a bilobed callus; disk with a linear callus near base. Column ca. 3 mm, foot ca. 3 mm. Capsule cylindric, to 10 cm × ca. 5 mm. Fl. and fr. throughout year.

Epiphytic on tree trunks in lowland forests. S Taiwan [Indonesia, Malaysia (Sabah), Thailand].


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