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

3. Trichotosia microphylla Blume, Bijdr. 343. 1825.

小叶毛鞘兰 xiao ye mao qiao lan

Eria microphylla (Blume) Blume; Pinalia microphylla (Blume) Kuntze.

Plants 4-6 cm tall, white hirsute. Rhizome long, slender. Stems ± tufted or 1-1.5 cm apart, erect, cylindric, 4-12 cm, ca. 2 mm in diam., covered with leaf sheaths. Leaves 10-12, alternate, fleshy; leaf blade narrowly elliptic or oblanceolate, 8-17 × 3-5 mm, both surfaces hirsute, apex obtuse. Inflorescence arising from upper portion of stem, opposite a leaf, 1-flowered; peduncle covered by 1 or 2 sheaths; floral bracts densely arranged, lanceolate, ca. 6 mm, covered with long hairs, acuminate. Flowers yellow; pedicel and ovary ca. 3 mm, covered with long hairs. Sepals white hirsute abaxially; dorsal sepal ovate, ca. 3 × 1.5-2 mm, obtuse or acuminate; lateral sepals oblong, ca. 5 × 3 mm, obtuse; mentum ca. 4 mm. Petals oblong, ca. 2.5 × 1.5 mm, rounded, glabrous; lip subobovate-oblong, ca. 5 × 2.5 mm, slightly contracted near middle, abaxially hirsute, base connected at a right angle with column foot, margin entire, apex obtuse or subtruncate; disk with 5 lamellae extending from base to near apex, near middle with a purple ellipsoid callus on either side. Column ca. 1.5 mm; thickened; foot ca. 4 mm. Capsule ellipsoid-cylindric, ca. 6 × 2.5 mm, densely white hirsute; fruiting pedicel ca. 2 mm. Fl. Apr-Jun, fr. Nov. 2n = 24 + 5B, 24 + 9B.

Epiphytic on tree trunks in forests; 1000-1500 m. Hainan, S Yunnan [Indonesia, Malaysia, Thailand, Vietnam].


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