Family

Aspleniaceae

Nomenclature

Asplenium yoshinagae Makino, Phan. Pterid. Jap. Icon. 1: pl. 64. 1900; K.Iwats., Acta Phytotax. Geobot. 26: 172. 1975; Tagawa & K.Iwats., Fl. Thailand 3: 285, f. 23.1. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 179. 2000.

Asplenium planicaule Wall. ex Mett., Abh. Senckenberg. Naturf. Ges. 3: 201. 1859, non Lowe 1858: C.Chr., Contr. U.S. Natl. Herb. 26: 332. 1931; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 231. 1940; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 87. 1967.

Asplenium indicum Sledge, Bull. Brit. Mus. (Nat. Hist.) Bot. 3: 264. 1965.

Description

Epiphytic. Rhizome short, erect, scaly; scales dark brown to nearly black, narrow, subulate, entire, up to 5 by 0.5 mm. Stipes usually up to 15 cm long, dark green to brownish, not polished, sparsely scaly. Laminae narrowly lanceolate, commonly about 20 by 5 cm, sometimes up to 40 by 8 cm, acute to acuminate at apex, pinnate; rachis like the upper part of stipe, rarely bulbils at bases of first acroscopic pinnules and on rachis near frond apex; pinnae 12–25 pairs, stalked, dimidiate, rhomboid, acute at apex, broadly cuneate and auricled at acroscopic base, narrowly cuneate and entire at basiscopic base, margin irregularly lobed with dentate margin, 2–4 by 0.7–1.5 cm, chartaceous, deep green, brownish in dried specimens. Sori elongate, many near the costa, indusia entire .

Distribution in Thailand

NORTHERN: Chiang Mai, Chiang Rai, Nan, Lamphun, Tak; NORTH-EASTERN: Phetchabun, Loei, Khon Kaen; SOUTH-WESTERN: Phetchaburi, CENTRAL: Saraburi; PENINSULAR: Surat Thani.

Distribution in Laos

Champasak.

Wider Distribution

Sri Lanka, N. & S India, Burma, S China, Indochina, Taiwan, Philippines, north to Japan.

Ecology

Usually epiphytic on mossy tree-trunks in dense forests at altitudes above 1300 m, sometimes lithophytic in moss on rocks.

Proposed IUCN Conservation Assessment

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

Voucher specimens - Thailand

Middleton et al. 4883, Chiang Mai, Doi Inthanon National Park (E); Middleton et al. 5002, Chiang Mai, Doi Chiang Dao Wildlife Sanctuary (E); Middleton et al. 5164, Loei, Phu Luang Wildlife Sanctuary (E).