Family

Davalliaceae

Nomenclature

Davallodes pseudocystopteris (Kunze) M.Kato & Tsutsumi, Acta Phytotax. Geobot. 59: 13. 2008. – Davallia pseudocystopteris Kunze, Bot. Zeit. 8: 68. 1850. – Leucostegia pseudocystopteris (Kunze) Bedd., Suppl. Ferns S India.: 4. 1876; Bedd., Handb. Ferns Brit. India: 54. 1883. – Araiostegia pseudocystopteris (Kunze) Copel., Philipp. J. Sci. 37: 241. 1927; Ching, Fl. Reipubl. Popularis Sin. 2: 2S7. 1959; Tagawa & K.Iwats., Acta Phytotax. Geobot. 24: 181. 1970; Tagawa & K.Iwats., Fl. Thailand 3: 155, f. 11.4. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 232. 2000.

Description

Rhizome long creeping, 3–4 mm diam.; scales oblong-ovate, round at apex, entire, appressed on the surface of rhizome, membranous, somewhat crisped. Stipes stramineous to pale castaneous, 8–15 cm long. Laminae subdeltoid to narrowly pentagonal in outline, acuminate at apex, up to 20 by 13 cm, quadripinnatifid; basal pinnae the largest, asymmetrically oblong-subtriangular, caudate acuminate at apex, broadly cuneate at base, stalked, up to 8 by 5 cm; upper pinnae narrowly oblong, gradually narrowing towards acute apex; pinnules quadrangular, round to moderately acute at apex, truncate at anterior and dimidiate at posterior bases, shortly stalked or subsessile; secondary pinnules pinnatifid, with sessile rhomboid segments; ultimate segments with a few acuminate entire lobes, papyraceous, rather thick, with yellow glands. Sori terminal on veinlets, usually at sinus between the ones of ultimate segments, small; indusia pale, thin, apex rounded to acute .

Distribution in Thailand

NORTHERN: Chiang Mai.

Wider Distribution

Himalayas, Upper Burma and SW China.

Ecology

Epiphytic on half-shaded tree trunks or on rocks in wooded limestone areas at about 2000 m alt.

Proposed IUCN Conservation Assessment

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

Voucher specimens - Thailand

Middleton et al. 4986, Chiang Mai, Doi Chiang Dao Wildlife Sanctuary (E).