Volume 12 > Part 2 > Year 2014 > Page 587 > Orchidaceae > Phaius

2. Phaius indochinensis Seidenf. & Ormerodwfo-0000268035

Opera Bot. 124: 17. 1995; Kurzweil, Adansonia, sér. 3, 32: 98, fig. 10. 2010; Males. Orchid J. 11: 34. 2013. Fig. 317; Plate LI: 2.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : Flowering shoots 60–94 cm tall, vegetative parts glabrous. Stems cane-like, fusiform cylindric, 33–45 by 1–1.2 cm. Foliage leaves 4–5, lanceolate-elliptic, acute, (20–)30–50 by (4.3–)5.8–8(–10) cm, petioles 2–13(–33) cm long; forming a pseudostem 5–13 cm long. Inflorescences 1–2, lax, glabrous or puberulous, arising laterally on the stem; peduncles 30–52 cm long; sterile bracts 3–4, lanceolate-elliptic, acute, 2.9–5.8 cm long; rachis (6.5–)12–23 cm long, 5- to 12-flowered; floral bracts caducous, ovate-lanceolate, acute, 20–30 mm long. Flowers with the sepal and petal outsides brownish-yellow and their inside brownish-purple with yellow edges, labellum yellow with reddish-brown markings, apex nearly pure yellow. Sepals narrowly obovate-lanceolate, apiculate, 26–40(–47) by 6–13 mm. Petals similar, lorate-elliptic, obtuse, 28–36(–42) by 3–6(–8) mm. Labellum 3-lobed, the basal 6–8 mm fused with the column, hairy on the median callus, 21–32 by 15–31 mm; mid-lobe orbicular, 3–9(–12) by 6–13 mm, truncate; side lobes triangular, obtuse, 5–10 by 6–12 mm, spreading; labellum ornamented by a median line, mostly with long white hairs in the distal part; spur conical, (2–)4–6 mm long. Column often sparsely pubescent, 19–22 mm long. Ovary (including pedicel) 20–38 mm long. Capsule ellipsoid, 25–48 by 5–15 mm.

Thailand : NORTH-EASTERN: Phetchabun (Thung Salaeng Luang NP – type: Seidenfaden & Smitinand GT 5603, holotype -C [spirit]), Loei; EASTERN: Chaiyaphum (fide Seidenf., Opera Bot. 89: 49. 1986 [as Phaius indigoferus]); SOUTH-EASTERN: Chanthaburi; PENINSULAR: Chumphon, Phangnga (fide Seidenf., op. cit.; identification uncertain, fruiting [as P. indigoferus]), Pattani.

Distribution : Vietnam.

Ecology : Terrestrial in dry evergreen forests, often near streams, 500–1,300 m alt. Flowering: November–January, also September.

Vernacular : Nam khang klang thiang (น้ำค้างกลางเที่ยง), Ueang phrao dong (เอื้องพร้าวดง)(Peninsular).

Notes: This species is very similar to Phaius indigoferus Hassk. from Java and Peninsular Malaysia, differing mainly in the orientation and colouring of the labellum side lobes and in its truncate labellum mid-lobe. The former two of these differences are difficult to see in herbarium material. Although the available herbarium material is generally not in a good condition, no Thai specimens referable to P. indigoferus have been seen.