Volume 12 > Part 1 > Year 2011 > Page 217 > Orchidaceae > Pecteilis

2. Pecteilis henryi Schltr.

Repert. Spec. Nov. Regni Veg. Beih. IV: 45. 1919; Seidenf. & Smitinand, Orchids Thail.: 53. 1959; Seidenf., Bot. Tidsskr. 66: 303, fig. 1. 1971; Dansk Bot. Ark. 31(3): 23, fig. 9. 1977; Opera Bot. 114: 54. 1992; S.C.Chen et al. in Z.Y. Wu et al. (eds), Fl. China 25: 137. 2009. [For synonyms, see Seidenf., Dansk Bot. Ark. 31(3): 25. 1977]. Fig. 128.

Accepted Name : This is currently accepted.

Description : Flowering shoots (32–)45–98 cm tall. Foliage leaves (6–)9–14, scattered along the stem, erect (above) to spreading (below), lanceolate-oblong to (linear-)lanceolate, acute, mucronate, (3–)4.5–17 by 0.8–3 cm. Inflorescence lax, 2- to 4-flowered (rarely 5-flowered); rachis 2–4(–8.5) cm long; bracts (narrowly) lanceolate, (27–)30–79 by 7–14 mm. Flowers white. Sepals rounded to subacute, 5- to 9-veined from the base; dorsal sepal broadly (obovate-helliptic, 16.7–19.5 by 15–17.1 mm; lateral sepals obliquely to falcately (elliptic-)ovate, less than twice as long as the petals, 18.6–22.7 by 12.1–14 mm. Petals recurved, falcately linear, much narrower than the lateral sepals, (sub)acute, 2- to 3-veined from the base, 16.6–21 by 2.2–3.1 mm. Labellum deeply three-lobed, with a tiny conical callus at base; midlobe linear, entire, 15.6–21.5 by (2–)3.1–3.6 mm; side lobes obliquely flabellate, laciniate, 17.4-21 by 12–15.1 mm; spur cylindric, 87–120 mm long. Column 7.2–8.3 mm long. Ovary (including pedicel) 27–40.5 mm long, provided with (sub)entire longitudinal keels.

Thailand : NORTHERN: Chiang Mai, Uttaradit (Laplae); NORTH-EASTERN: Nong Khai; SOUTH-EASTERN: Sa Kaeo.

Distribution : India (Manipur), Myanmar, SW China (Yunnan – type), Laos, Cambodia, Vietnam.

Ecology : Open marshy ground in pine/dipterocarp and pine/oak forests on granite or sandstone bedrock; 670–1,100 m alt. Flowering: recorded in June and October–November.

Vernacular : Khu lu (คูลู)(Southeastern).