Volume 12 > Part 2 > Year 2014 > Page 366 > Orchidaceae > Calanthe

17. Calanthe rosea (Lindl.) Benth.wfo-0000764996

J. Linn. Soc., Bot. 18: 309. 1881 (in obs.); Hook.f., Fl. Brit. India 5: 856. 1890; Seidenf. & Smitinand, Orchids Thail.: 333, 792, fig. 254. 1961–1965; Seidenf., Dansk Bot. Ark. 29(2): 39, fig. 14. 1975; Vaddhanaphuti, Wild Orchids Thail., ed. 4: 53 (incl. colour photo). 2005; Kurzweil, Adansonia, sér. 3, 32: 73, fig. 4. 2010; D.A.Clayton & P.J.Cribb, Gen. Calanthe: 40, fig. 9.6, t. 2A. 2013.— Limatodis rosea Lindl., Paxton’s Fl. Gard. 3: 35. 1852.— Alismorkis rosea (Lindl.) Kuntze, Revis. Gen. Pl. 2: 650. 1891. Fig. 204; Plate XXIX: 1.

Accepted Name : This is currently accepted.

Description : Flowering shoots 22–55(–66) cm tall. Pseudobulbs prominent, ovoid or oblong, 2.4–14 by 1–3.5 cm. Foliage leaves usually 4, elliptic-oblong, acute, annual, glabrous, 37–40 by 5.8–11 cm; petioles 3.5–6 cm long. Inflorescences lax or semi-dense, softly pubescent, upper part sometimes nodding; peduncles to 46 cm long; sterile bracts 4–8, lanceolate-oblong, acute or acuminate, 1–6 cm long; rachis 10–20 cm long, 5- to many-flowered; floral bracts ovate-lanceolate, acuminate, persistent, 12–25(–33) by 3–8 mm. Flowers pink, labellum often with white base and dark pink epichile. Sepals ovate-lanceolate, acute, softly pubescent on the outside; dorsal sepal (16–)19–30 by 6–8 mm; lateral sepals (17–)19–30 by 4.5–7 mm. Petals obovate-elliptic, acuminate, largely glabrous, (17–)20–30 by 5.3–8.5(–9) mm. Labellum unlobed, rounded-rectangular and apically emarginate, base not fused with the sides of the column but rolled around it, (18–)23.5–35 by (11–)12.5–16 mm; without prominent ornaments; spur cylindric, pubescent, 11–16 mm long. Column pubescent, 4–6 mm long. Ovary (including pedicel) pubescent, 20–29 mm long. Capsule not seen.

Thailand : NORTHERN: Nan, Lampang, Tak; NORTH-EASTERN: Phetchabun; SOUTH WESTERN: Uthai Thani, Kanchanaburi, Phetchaburi; SOUTH-EASTERN: Prachin Buri.

Distribution : Myanmar (type).

Ecology : Lithophytic or rarely epiphytic in mixed dry evergreen or deciduous forests over limestone; 200–900 m alt. Flowering: (November–)December–January(–February).

Vernacular : Ueang khaoniao ling (เอื้องข้าวเหนียวลิง), ueang chomphu phrai (เอื้องชมพูไพร)(Central); ua chomphu phrai (อั้วชมพูไพร).

Notes: Plants of a Calanthe, said to come from Kanchanaburi Province, which are occasionally on sale at Chatuchak Market in Bangkok have been interpreted as belonging to a yet undescribed species. The species is apparently similar to C. rosea but differs in being a much smaller plant and by having fewer and smaller flowers with a slightly different labellum shape. No material was available during the preparation of this flora account as permanent collections have not been made.