Asplenium affine Sw.
Asplenium affine Sw., Schrad. J. Bot. 1800(2): 56. 1801; Bedd., Handb. Ferns Brit. India: 157. 1883; Sledge, Bull. Brit. Mus. (Nat. Hist.) Bot. 3: 269, f. 2. 1965; Holttum, Rev. Fl. Malaya, ed. 2, 2: 634. 1968; Tagawa & K.Iwats., Fl. Thailand 3: 288. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 138. 2000; Newman et al., Checkl. Vasc. Pl. Lao PDR: 25. 2007. - Type: Mascarene Islands, Mauritius, Gröndahl s.n. (S).
Asplenium spathulinum J.Sm. ex Hook., Sp. Fil. 3: 170. 1860, non Kunze, Bot. Zeitung 6: 524. 1848: Tardieu & C.Chr., Fl. Indo-Chine 7(2): 238. 1940; Holttum, Rev. Fl. Malaya ed. 1, 2: 439, f. 257. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 20: 28. 1961. - Type: Philippines, Luzon, Cuming 210 (BM, K).
Epiphytic. Rhizome short creeping, ascending, densely covered with scales at apex; scales linear, gradually narrowing towards hair-pointed apex, up to 15 by 1 mm, dark brown, clathrate, entire, more or less crisped at upper portion. Stipes dark green to nearly black, minutely scaly or glabrescent, about 15 cm long. Laminae oblong-subtriangular, narrowing towards apex, about 30 by 15 cm, bipinnate; pinnae more than 10 pairs, lowest ones the largest, stalked, oblong-subtriangular, acuminate at apex, broadly cuneate at base, up to 10 by 3.5 cm; pinnules of lower pinnae oblong-subquadrangular, rounded to moderately acute at apex, narrowly cuneate at base, shortly stalked or subsessile, lobed to 1/4–1/3, or deeply lobed to have an acroscopic lobe, about 15 by 6 mm; lobes acute to moderately acute at apex, serrate with one-nerved teeth, chartaceous to subcoriaceous; veins distinct on both surfaces, a few times forked. Sori many, up to 5 mm long; indusia pale, stiff and persistent .
Distribution in Thailand
NORTHERN: Tak, Phitsanulok; NORTH-EASTERN: Loei; SOUTH-EASTERN: Prachin Buri; PENINSULAR: Phangnga.
Distribution in Laos
Madagascar, Mascarene Islands, Seychelles, Sri Lanka, S India, Hainan, Cambodia, Malesia to New Hebrides and Fiji.
On mossy tree trunks in moist dense forests at medium altitudes (400–1300 m).
Proposed IUCN Conservation Assessment
Least Concern (LC). This species is widespread and not under any known threats.
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