Family

Lomariopsidaceae

Nomenclature

Nephrolepis davallioides (Sw.) Kunze, Bot. Zeit. 1846: 460; Bedd., Suppl. Ferns Brit. India: 81. 1892; Holttum, Rev. Fl. Malaya, ed. 2, 2: 634. 1968; Tagawa & K.Iwats., Fl. Thailand 3: 172, f. 13.1. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 238. 2000; Hovenkamp & Miyamoto, Blumea 50: 298. 2005. – Aspidium davallioides Sw., Schrad. J. Bot. 1800(2): 33. 1801.

Ophioglossum acuminatum Houtt., Nat. Hist. 14: 94. 1783. – Nephrolepis acuminata (Houtt.) Kuhn, Ann. Mus. Bot. Lugduno-Batavi 4: 286. 1869, non C.Presl 1836: Holttum, Rev. Fl. Malaya ed. 1, 2: 378, f. 220. 1955 [‘1954’]; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 77. 1967.

Description

Rhizome short creeping, about 1 cm diam., bearing close fronds, densely scaly; scales gradually narrowing from round base to tailed apex, up to 2.5 by 1 mm, dark with brown ferrugineous margin. Stipes stramineous, up to 30 cm long, minutely appressed-scaly, grooved on upper surface. Laminae narrowly lanceolate, up to 1 m or more long, 30 cm wide, pinnate; lateral pinnae up to 50 pairs, basal ones shortened, lower ones sterile, up to 15 by 2 cm, entire, falcate at tip, upper ones fertile, up to 13 by 1.2 cm, lobed at margin, papyraceous; veins forked near costa, visible, all free. Sori one to each lobe at margin of fertile pinnae, terminal on anterior branch of veins, round; indusia usually round , about 1.5 mm broad.

Distribution in Thailand

PENINSULAR: Surat Thani, Nakhon Si Thammarat, Yala.

Wider Distribution

Sumatra, Peninsular Malaysia to New Guinea.

Ecology

On rather dry rocks or on fallen tree trunks in dense tropical rain forests or in clearings at medium altitudes (1000–1500 m).

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is widespread and not under any known threat.

Voucher specimens - Thailand

Middleton et al. 4391 & 5506, Nakhon Si Thammarat, Namtok Yong National Park (E).