Volume 3 > Part 3 > Year 1988 > Page 457 > Athyriaceae > Diplazium

12. Diplazium tomentosum Blumewfo-0001255199

Enum. Pl. Javae: 192. 1828; Bedd., Handb. Ferns Brit. India: 179. 1883; Tardieu & C.Chr. in Fl. Indo-Chine 7(2): 257. 1940; Tagawa & K.Iwats., S.E. Asian Stud. 5: 103. 1967.— Athyrium tomentosum (Blume) Milde, Bot. Zeitung (Berlin) 1870: 354; Holttum, Rev. Fl. Malaya 2: 551. f. 324. 1955.

Accepted Name : This is currently accepted.

Description : Rhizome short, erect or ascending, bearing wiry roots; scales narrow, up to 4 by 0.6 mm, concolorous, dark brown, subentire or irregularly waved at margin. Stipe stramineous with dark castaneous lower portion, up to 35 cm long on soriferous fronds and 15 cm on sterile ones. Frond pinnate-bipinnatifid, oblong-subdeltoid, attenuate at apex, with deflexed basal pinnae, up to 30 by 12 cm; rachis densely covered with short coarse multicellular hairs with brown septa; lowest pinnae deflexed, lanceolate, shortly stalked, auricled at acroscopic base, up to 7 by 2 cm; lower and middle pinnae shortly stalked, patent, acute to acuminate at apex, auricled at acroscopic and rounded to cuneate at basiscopic bases, lobed ⅕–⅔ way to costa, upper pinnae sessile to adnate at base; lobes oblique, oblong, moderately acute at apex, toothed, up to 10 by 4 mm; chartaceous, deep green, dark when dry, veins pinnate, veinlets simple or forked. Sori on practically all veinlets of tall soriferous frond, usually only on basal acroscopic veinlets; indusia firm, persistent.

Thailand : SOUTH-EASTERN: Chanthaburi (Khao Sabap), Trat (Bo Rai); PENINSULAR: Surat Thani (Khao Nom Sao), Krabi (Phanom Bencha), Nakhon Si Thammarat (Khao Luang), Trang (Khao Sung), Narathiwat (Waeng).

Distribution : Burma (Tenessarim), Malaya, Vietnam, Sumatra, Java (type), Borneo, Mindanao.

Ecology : On mountain slopes in dense evergreen forests at altitudes below 800 m.

E-version notes : For more details see Ferns of Thailand, Laos and Cambodia.