Selliguea enervis (Cav.) Ching

Family

Polypodiaceae

Nomenclature

Selliguea enervis (Cav.) Ching, Bull Fan. Mem. Inst. Biol. 10: 239. 1941; Hovenkamp, Fl. Males., Ser. II, Ferns and Fern Allies 3: 200. 1998. – Polypodium enerve Cav., Descr.: 245. 1802. – Crypsinus enervis (Cav.) Copel., Gen. Fil.: 207. 1947; Holttum, Rev. Fl. Malaya ed. 1, 2: 199, f. 100.1955 [‘1954’]; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 176. 1970; Tagawa & K.Iwats., Fl. Thailand 3: 557. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 266. 2000. – Crypsinopsis enervis (Cav.) Pic.-Serm., Webbia 31: 242. 1977. – Type: Nee s.n. (MA, teste C.Chr.), Philippines, ?Luzon, "Marianas".

For further synonymy see Hovenkamp, Fl. Males., Ser. II, Ferns and Fern Allies 3: 200. 1998.

Description

Rhizome long creeping, 1.5–2(–4) mm diam., densely scaly throughout; scales peltate, oblong with long tails, 2.5–5 by 0.5–1 mm, round at base, gradually narrowing towards hairy tails, irregularly hairy at edges, brown, the central portion dark or evenly coloured. Fronds simple. Stipes stramineous, (2–)5–8(–25) cm long, scaly at base, glabrous above. Laminae oblong-lanceolate, round at base, widest slightly above base and gradually narrowing towards attenuately acuminate apex, (4–)10–22(–30) by 1.2–4(–8) cm; midrib and lateral main veins raised, straight; other veins invisible, copiously anastomosing with free included veinlets in areoles; coriaceous, glabrous, the edges entire, thickened and a little involved. Sori round, small, many, in two rather irregular rows between adjacent main veins, superficial .

Distribution in Thailand

PENINSULAR: Trang.

Wider Distribution

Throughout Malesia.

Ecology

Recorded in evergreen forests at 800 m alt.

Proposed IUCN Conservation Assessment

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

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