Volume 12 > Part 3 > Year 2022 > Page 983 > Orchidaceae > Porpax

12. Porpax ustulata (C.S.P.Parish & Rchb.f.) Rolfewfo-0000281031

Orchid Rev. 16: 8. 1908; Seidenf. & Smitinand, Orchids Thailand: 314, fig 234. 1960; Seidenf., Bot. Tidsskr. 72: 8, fig. 7. 1977; Opera Bot. 89: 122, fig. 73, t. Xc. 1986; Thaithong, Thai Orchids [in Thai]: 309, colour photos on pp. 308–309. 2000; Vaddhanaphuti, Wild Orchids Thailand, ed. 4: 211 (incl. colour photo). 2005; Sittisudjathum, Wild Orchids Thailand [in Thai]: 387 (incl. colour photos). 2006; Nanakorn & Watthana, QSBG (Thai Native Orchids 2): 231, colour photos on pp. 54–55. 2008; Aver. et al., Novitates Syst. Pl. Vasc. 50: 36. 2019.— Eria ustulata C.S.P.Parish & Rchb.f., Trans. Linn. Soc. London 30: 147. 1874; Hook.f., Fl. Brit. India 5: 787. 1890; Grant, Orchids Burma: 150. 1895; S.C.Chen & J.J.Wood in Z.Y.Wu et al. (eds.), Fl. China 25: 360. 2009.— Pinalia ustulata (C.S.P.Parish & Rchb.f.) Kuntze, Revis. Gen. Pl. 2: 679. 1891. Fig. 539.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : Pseudobulbs globose-discoid, 6–8 mm across, covered by distinctly reticulate-veined sheaths, not fully developed until flowering has ceased. Leaves 2, obovate to obovate-oblong, rounded to subacute, apiculate, 1.5–3.5 by 0.8–1.8 cm, margin sparsely ciliate. Inflorescence appearing before the leaves, short, 1- or 2-flowered; peduncle up to 4 mm long; floral bracts up to 2 mm long, not much longer than pedicel and ovary. Flowers suberect, red, curved. Dorsal sepal ovate, acute to shortly acuminate, 5.5–12 mm long, connate with the lateral sepals for up to 1/2 of its length, 3.5–7.5 by 5.3–6 mm, sparsely hispid on the outside, usually with scattered transparent dots. Lateral sepals 6.7–9 mm long, connate for 1/2–2/3 of their length; lobes usually divergent, each lobe narrowly triangular, acuminate, 3.7–4.5 by 2.1–2.3 mm, gibbous at base. Petals falcately oblong, 9–10 by 1.8–2 mm, entire to erose. Labellum recurved, suboblong-lanceolate, cuspidate, 2–3 by 0.7–1 mm (1.8–1.9 mm wide when expanded), distal margin shortly fimbriate; base narrow with a callus. Column stout, 1–1.5 mm long; foot 1.2–2 mm long; anther 0.6–0.9 by 0.5–0.8 mm. Ovary (including pedicel) 1.3–1.5 mm, hispid. Capsule broadly obovoid, ca 3 by 3.5 mm; fruit pedicel 4–5 mm long.

Thailand : NORTHERN: Chiang Mai, Chiang Rai, Nan, Tak; SOUTH-WESTERN: Kanchanaburi; CENTRAL: Nakhon Nayok; SOUTH-EASTERN: Trat.

Distribution : Myanmar (type), China (Yunnan), Laos, Vietnam.

Ecology : Growing as an epiphyte in hill evergreen forests and freshwater swamp forests, 400–1,200 m alt. Flowering: May–August.

Vernacular : Ueang ta khai lek (เอื้องตาข่ายเล็ก)(Chiang Mai).