Volume 12 > Part 2 > Year 2014 > Page 427 > Orchidaceae > Coelogyne

30. Coelogyne trinervis Lindl.wfo-0000909490

Gen. Sp. Orchid. Pl.: 41. 1830; Hook.f., Fl. Brit. India 5: 832; 6: 193. 1890; Pfitzer & Kraenzl. in Engl. (ed.), Pflanzenr. IV 50 II B 7: 47, fig. 15A. 1907; Seidenf., Dansk Bot. Ark. 29(4): 44, fig. 16. 1975; J.B.Comber, Orchids Java: 116, phot. 1990; Seidenf. & J.J.Wood, Orchids Penins. Malays. Singap.: 207, fig. 88a–d. 1992; J.B.Comber, Orchids Sumatra: 353, phot. 2001; D.A.Clayton, Gen. Coelogyne: 214, fig. 26(7), t. 24C. 2002; Elis.George & J.-C.George, Coelogynes: 133, phot., watercolour. 2011.— Pleione trinervis (Lindl.) Kuntze, Revis. Gen. Pl. 2: 680. 1891. Fig. 240.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : [Sect. Flaccidae Lindl.]. Pseudobulbs ca 1–3 cm apart, ovoid, angular, 3–8 by 3–4.5 cm. Leaves 2, herbaceous; petiole 2–12 cm; lamina linear–lanceolate, 12–45 by 3–4.5 cm, acute; nerves 3, below prominent. Inflorescence proteranthous; peduncle 4–7 cm, largely to entirely covered by scale leaves; rachis zig-zag, curved, 4–8 cm, internodes 1–2.5 cm. Floral bracts caducous during anthesis, lanceolate, to 25 by 8 mm. Flowers 5–8, open simultaneously, sweet fragrant, 3–4 cm in diameter, glabrous; sepals, petals and column white to pale pink or pale green; labellum white, usually with yellow margins on claw, brown side lobes and brown on mid-lobe. Dorsal sepal patent, elliptic-lanceolate, 20–25 by 6–8 mm. Lateral sepals oblong, acute, 20–25 by 5–7 mm. Petals linear-lanceolate, acute, 18–20 by 2–3 mm. Labellum 3-lobed, 20–22 by 14–16 mm; side lobes semi-elliptic, in front receding, without sinus; mid-lobe ovate to transversely elliptic, 6–7 by 6–8 mm, margins undulate, claw 2–3 mm long with irregular margins, top broadly acute, apex rounded; ornaments of 3 keels on disk, median shorter, laterals continuing to halfway or almost the top of the mid-lobe, undulate, addadditional keels on mid-lobe 0–4. Column 16–18 mm; top winged, apex notched, irregular.

Thailand : NORTHERN: Mae Hong Son (Pang Ma Pha), Chiang Mai, Chiang Rai, Lamphun, Lampang, Tak, Phitsanulok, Kamphaeng Phet; NORTH-EASTERN: Loei, Nakhon Phanom (Huai Kok); EASTERN: Chaiyaphum (Chulabhorn dam), Ubon Ratchathani (Pha Taem); SOUTH-WESTERN: Kanchanaburi, Phetchaburi (Kaeng Krachan); CENTRAL: Nakhon Nayok (Khao Yai); SOUTH-EASTERN: Chanthaburi (Khao Sabap), Trat; PENINSULAR: Phangnga (Kasom), Trang, Satun (Khuan Don).

Distribution : India, Myanmar (type), Laos, Cambodia, Vietnam, Peninsular Malaysia, Sumatra, Java.

Ecology : Lowland to lower montane deciduous forests. Epiphyte on tree trunks, sometimes lithophytic on mossy rocks; 100 to 2,000 m alt. Flowering: September–December.

Vernacular : Ueang mak (เอื้องหมาก)(Northern).