Volume 12 > Part 1 > Year 2011 > Page 11 > Orchidaceae > Anoectochilus

1. Anoectochilus albolineatus E.C.Parish & Rchb.f.

Trans. Linn. Soc. London 30: 141. 1874; Seidenf., Bot. Tidsskr. 65: 118 p.p., excl. fig. 11. 1969; Seidenf. & Smitinand, Orchids Thail.: 87. 1959; Bot. Tidsskr. 66: 318 p.p., excl. fig. 12. 1971; Dansk Bot. Ark. 32(2): 50 p.p., excl. fig. 28. 1978. Fig. 2; Plate I: 1.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : Flowering shoots 7–32.5 cm tall. Foliage leaves very dark green to brown with pink to whitish reticulation above, uniformly pink below; lamina obliquely (ovate-helliptic, acute to subacuminate, mucronate, (1.8–)3.1–7 by (1.3–)2–5.5 cm. Inflorescence glandular-pubescent; rachis 1.5–7.6 cm long, 3- to 13-flowered; bracts lanceolate-oblong to ovate-lanceolate, 1-veined, pubescent on the dorsal side, 10.1–12 by 3.9–5.9 mm. Flowers short-pedicelled to subsessile, mainly greenish-yellow to purplish-green with white labellum. Sepals glandular pubescent on the dorsal side; dorsal sepal lanceolate-oblong, 8.6–9.3 by 3.9–4.1 mm; lateral sepals obliquely oblanceolate-oblong, subacuminate to obtuse, 9.4–9.9 by 3.4–3.5 mm. Petals obliquely oblanceolate, 8.4–9.6 by ca 2.9 mm. Labellum 6.8–7 mm long along the mid-line; spur pointing backwards (parallel to the ovary), describing an obtuse to nearly right angle to the mesochile, fusiform-ovoid, retuse, ca 4.5 mm long, only the pointed apex protruding below the bases of the lateral sepals; mesochile with a pair of pectinate flanges; epichile lobules 6.5–6.6 mm long, 1.5–2.5 times as long as wide, describing an acute angle to each other when flattened, forming a tiny conical receptacle at base. Column porrect (more or less continuing the line of the ovary), 5.6–5.9 mm long; wings on the front not prolonged into the spur; anther 5.1–5.3 mm long. Ovary (including pedicel) 9–13 mm long. Capsule suberect, short-pedicelled to subsessile, 1.2–1.4 cm long, 0.4–0.5 cm in diameter.

Thailand : NORTHERN: Mae Hong Son (Ban Huai Pong), Chiang Mai, Nan (Doi Phu Kha), Phitsanulok; SOUTH-WESTERN: Phetchaburi (Kaeng Krachan); CENTRAL: Nakhon Nayok (Khao Yai); PENINSULAR: Ranong (Khao Phota Luang Kaeo).

Distribution : Myanmar (type), Vietnam.

Ecology : Shaded humus-rich ground in seasonal evergreen forests and hill evergreen forests on granite or sandstone bedrock: 700–1,850 m alt. Flowering: October–February (one flowering collection from July).

Vernacular : Ueang din siam (เอื้องดินสยาม).

Notes: The name Anoectochilus albolineatus has been widely misapplied for A. reinwardtii. However, Ormerod (2005) found the holotype of A. albolineatus to be identical with the species later described as A. siamensis.