Nephrolepis cordifolia (L.) C.Presl
Nephrolepis cordifolia (L.) C.Presl, Tent. Pterid.: 79. 1836; Bedd., Handb. Ferns Brit. India: 282, f. 144. 1883; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 289, f. 28.1 & 28.2. 1941; Holttum, Rev. Fl. Malaya ed. 1, 2: 379. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 20: 26. 1961; Ching, Fl. Reipubl. Popularis Sin. 2: 315, pl. 28, f. 7 & 8. 1959; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 77. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 172. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 173, 237. 2000; Hovenkamp & Miyamoto, Blumea 50: 294. 2005. – Polypodium cordifolium L., Sp. Pl. 2: 1089. 1753.
Rhizome short, ascending to suberect, bearing a tuft of fronds, numerous wiry roots and stolons, densely scaly; scales acuminate at basal edge and long-tailed at apical edge, narrowly lanceolate, up to 7 by 0.8 mm broad, thin, pale brown. Stipes terete, up to about 10 cm long, scaly with narrow scales, stramineous or darker. Laminae linear-lanceolate moderately acute at apex, gradually narrowing towards base, up to 80 cm or more long, 6 cm wide, pinnate; rachis grooved on upper surface, scaly above; lateral pinnae up to 100 pairs; middle ones larger, patent, acute, to moderately acute at apex, truncate at base, auricled at anterior base, sessile, up to 3 cm by 7 mm, shallowly serrate at margin, papyraceous; veins visible on lower surface, forked near costa. Sori at middle to submarginal position between costa and margin of pinna, in one row; indusia broad, thin but stiff, large, brown, glabrous , up to 2 mm broad.
Distribution in Thailand
NORTHERN: Mae Hong Son, Chiang Mai, Phitsanulok; NORTH-EASTERN: Loei; SOUTH-EASTERN: Chanthaburi.
Distribution in Laos
Pantropical, north to Japan and south to New Zealand.
Terrestrial on mountain slopes, on muddy or dry rocks, or on tall tree trunks in light shade at 500–1300 m alt.
Proposed IUCN Conservation Assessment
Least Concern (LC). This species is widespread and not under any known threat.
This is commonly cultivated as an ornamental.
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