Volume 12 > Part 1 > Year 2011 > Page 126 > Orchidaceae > Habenaria

30. Habenaria myriotricha Gagnep.

Bull. Soc. Bot. France 78:72. 1931; Seidenf., Bot. Tidsskr. 68: 43. 1973; Dansk Bot. Ark. 31(3): fig. 50. 1977; Opera Bot. 114: 60. 1992; Kurzweil, Thai Forest Bull., Bot., special issue: 30. 2009. Fig. 71; Plate IX: 3.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : Flowering shoots glabrous, 19–40 cm tall. Foliage leaves (2–)4–5, cauline, scattered in the lower two thirds of the stem, lanceolate, acute or acuminate, mucronate, 8–15 by 2–2.5 cm. Sterile bracts 1–3, erect, lanceolate to ovate, acuminate, (2–)3–4.4 cm long, margins minutely denticulate or shortly hairy. Inflorescence lax, few-flowered; rachis 3–4 cm long; floral bracts narrowly lanceolate, acuminate, 15–25 by 2–5 mm, margins sometimes shortly hairy. Flowers white with green sepals and petals, labellum base often red. Sepals acute; dorsal sepal erect, ovate, 8–8.5 by 4–4.2 mm; lateral sepals spreading to somewhat reflexed, obliquely ovate, 7.5–11.5 by 4.75–4.9 mm, basally united with the labellum. Petals forming a hood with the dorsal sepal, linear, acute or obtuse, 7–8 by 0.5–1 mm. Labellum 18–25 mm long, 3-lobed above a basal united part of 4.5–7 mm; midlobe linear-oblong, 4–8 by 0.7–1 mm; side lobes 13–23 mm long, with 15–17 laciniae 11.5–20 by 0.25–0.3 mm; spur cylindric, 31–40 mm long, sometimes distally clavate. Column 3.5–4.5 mm long; anther erect, anther canals 1.7–3 mm long; auricles insignificant. Ovary (including pedicel) 20–40 mm long. Capsule not seen.

Thailand : NORTHERN: Tak, Kamphaeng Phet; NORTH-EASTERN: (fide Vaddhanaphuti, Field Guide Wild Orchids Thail. ed. 4: 166. 2005).

Distribution : Laos (type), Vietnam.

Ecology : Mostly unknown, one collection reported in a limestone crevice at 600 m alt. Flowering: June–September.