Family

Athyriaceae

Nomenclature

Diplazium crenatoserratum (Blume) T.Moore, Index Filic.: 121. 1859; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 104. 1967; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 56. 1968; Tagawa & K.Iwats., Fl. Thailand 3: 459. 1988; Boonkerd & Pollawatn, Pterid. Thailand: 191. 2000. – Asplenium crenatoserratum Blume, Enum. Pl. Javae.: 177. 1828. – Athyrium crenatoserratum (Blume) Milde, Bot. Zeit. 1870: 353. 1870; Holttum, Rev. Fl. Malaya ed. 1, 2: 561, f. 332. 1955 [‘1954’].

Description

Rhizome short, erect; scales narrow, up to 8 by 1.3 mm, concolorous, dark brown, irregularly toothed at margin. Stipes up to 50 cm long, stramineous with dark scaly base, glabrous. Frond narrowly oblong-subtriangular, attenuate towards apex, widest at base, usually longer than stipe, up to 25 cm wide, pinnate without distinct terminal pinna; rachis grooved above, minutely hairy, usually with bulbils in apical portion; lateral pinnae about 20 pairs, lower ones stalked, narrowly oblong, acuminate at apex, distinctly auricled at acroscopic and auricled or cuneate at basiscopic bases, up to 13 by 2.3 cm, lobed to 1/3 way to costa or nearly entire; softly chartaceous; veins pinnate with simple veinlets, glabrous. Sori practically on all veinlets, diplazioid usually only on basal anterior ones; indusia thin but firm, persistent .

Distribution in Thailand

PENINSULAR: Surat Thani, Nakhon Si Thammarat, Phatthalung, Trang, Satun, Yala.

Wider Distribution

Malesia.

Ecology

On moist mountain slopes in dense evergreen forests at low to medium elevations lower than 1000 m alt.

Similar species

Diplazium silvaticum (Bory) Sw.

Diplazium mettenianum (Miq.) C.Chr.

Proposed IUCN Conservation Assessment

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