Selliguea heterocarpa (Blume) Blume
Selliguea heterocarpa (Blume) Blume, Enum. Pl. Javae Addenda. 1828; Blume, Fl. Javae Fil.: 125, t. 52, f. 1. 1829; Holttum, Rev. Fl. Malaya ed. 1, 2: 157, f. 69. 1955 [‘1954’]; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 53. 1968; Tagawa & K.Iwats., Fl. Thailand 3: 563, f. 56.10–11. 1989; Hovenkamp, Fl. Males., Ser. II, Ferns and Fern Allies 3: 209. 1998; Boonkerd & Pollawatn, Pterid. Thailand: 261, 289. 2000. – Grammitis heterocarpa Blume, Enum. Pl. Javae 118. 1828. – Type: Reinwardt s.n. (L), Java.
Rhizome short creeping, 2–4 mm diam., densely scaly throughout; scales peltate, oblong-subtriangular with very long tail, pale brown, concolourous, not clathrate, 5–8 by 1–1.4 mm, fimbriate at basal margin, toothed at basal lateral margin. Fronds dimorphic. Stipes 2–12(–28) cm long, fertile fronds usually taller, stramineous, scaly at base. Laminae simple, often drying reddish, oblong to oblong-lanceolate or ovate, entire, gradually narrowing towards acuminate apex, tapering at base, broadest at about basal 1/4 way, 12–18(–52) by 0.6–3.5(–4.8) cm in fertile and 23–37 by 0.8–6.3(–8.5) cm in sterile ones; leathery, light green, more or less reddish in dried specimens; midrib and lateral main veins distinct, the other veins hardly visible, anastomosing with included free veinlets. Sori linear, in one row between adjacent lateral main veins, continuous or more or less interrupted (in which case circular or oblong), immersed to some extent and raised on upper surface.
Distribution in Thailand
PENINSULAR: Surat Thani, Phangnga, Nakhon Si Thammarat, Satun, Songkhla, Yala.
Indochina, Peninsular Malaysia, Sumatra, Java, Borneo, and the Philippines.
On rocks or on tree trunks usually by streams in not so dense evergreen forests at low altitudes.
Proposed IUCN Conservation Assessment
Least Concern (LC). This species is widespread and not under any known threat.
Voucher specimens - Thailand
Middleton et al. 5331, Songkhla, Ton Nga Chang Wildlife Sanctuary (E).
Upper surface of lamina
Lower surface of frond with linear sori
Lower surface of frond with round sori
Variation in sorus shape
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