Volume 12 > Part 3 > Year 2022 > Page 707 > Orchidaceae > Ceratostylis

5. Ceratostylis subulata Blumewfo-0000834046

Bijdr. Fl. Ned. Ind.: 306. 1825; Seidenf. & Smitinand, Orchids Thailand: 316, fig. 240; Holttum, Revis. Fl. Malaya 1: 493. 1964; Seidenf., Opera Bot. 89: 109, fig. 62. 1986; Opera Bot. 114: 161. 1992; Seidenf. & J.J.Wood, Orchids Penins. Malaysia Singapore: 310, fig 136a–d, t. 19b. 1992.; J.H.Beaman et al., Orchids Sarawak: 195. 2001; N.Pearce & P.J.Cribb, Fl. Bhutan 3(3): 363. 2003; S.C.Chen & J.J.Wood in Z.Y.Wu et al. (eds.), Fl. China 25: 361. 2009. Fig. 376; Plate LVIII: 2.

Accepted Name : This is currently accepted.

Description : Epiphyte or lithophyte, 10–25 cm tall. Stem (0.6–)8–18 cm long; sheaths at base, (0.5–3) 6.5–10 by 3–9.5 mm. Leaves solitary, 2–6 cm long, subterete, narrowed towards the apex, acute. Inflorescence 4–8 mm long, capitate, sessile, several-flowered; inflorescence bract 3–5 by 2.5–4 mm, 5-veined; floral bracts (1.5–)3–6.6 by 0.5–2.1 mm, 1–3-veined. Flower 4–6.5 by 2–3 mm, yellow or pale pink with yellow labellum. Sepals: dorsal sepal oblong-elliptic, 1.5–2.8 by 0.5–1.3 mm, 3-veined; lateral sepals oblong-ovate, (2–)1.5–2.5 mm long from apex without column foot, 3-veined. Petals narrowly elliptic, acute, 1–2 by 0.2–0.8 mm, 1-veined, glabrous, entire. Labellum oblong spathulate, narrow basally, gradually broadened and thickened towards the apex; epichile oblong, 1.5–2 by 0.9–1.5 mm, apical part fleshy, margin erose and thinner, apex obtuse and villiform; mesochile 0.5–1.2 by 0.3–0.7 mm; hypochile 0.9–1.8 by 0.2–0.4 mm. Column 1–1.5 mm long; anther obliquely triangular, 0.2–0.7 by 0.5–0.7 mm; pollinia 0.2–0.5 by 0.1–0.4 mm. Ovary (including pedicel)(2–)2.8–4.9 mm, hairy. Capsule green, obovoid-ellipsoid, ellipsoid or oblong, 6–10 by ca 1–4 mm.

Thailand : PENINSULAR: Surat Thani (Khao Nong), Phangnga (Ton Pariwat), Nakhon Si Thammarat, Satun (Khao Kaeo Range), Pattani (Khao Kalakhiri), Yala (Khao Pok Yo).

Distribution : India, Myanmar, China, Indonesia (type).

Ecology : Growing as an epiphyte or lithophyte in montane evergreen forests, or in dry evergreen forests on fully exposed granite bedrock, (200–)700–1,200(–1,550) m alt. Flowering: recorded in January, March, May and July–October.