Davallia perdurans Christ

Family

Davalliaceae

Nomenclature

Davallia perdurans Christ, Bull. Herb. Boissier 6: 970. 1898.

Davallia clarkei var. faberiana C.Chr., Acta Horti Gothob. 1: 73. 1924. – Araiostegiella faberiana (C.Chr.) M.Kato & Tsutsumi, Acta Phytotax. Geobot. 59(1): 12. 2008. – Araiostegia faberiana (C.Chr.) Ching, Fl. Reipubl. Popularis Sin. 2: 293. 1959; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 76. 1967; Tagawa & K.Iwats., Acta Phytotax. Geobot. 24: 180. 1970; Tagawa & K.Iwats., Fl. Thailand 3: 152, f. 11.2. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 232. 2000.

Description

Epiphytic. Rhizome long creeping, 5–7 mm diam., densely covered with scales throughout; scales oblong with long-tailed apex, up to 1 cm or more long, 4 mm broad, membranous, pale brown, margin subentire. Stipes on phyllopodia about 1 cm high, stramineous or purplish or pale castaneous, up to 20 cm long, with large thin scales, denser near base, easily rubbed off. Laminae broadly subdeltoid, acuminate at apex, quadripinnatifid, about 50 cm long and broad; all pinnae catadromic; basal pinnae the largest, oblong, acuminate at apex, sometimes bearing reduced basal pinnules, up to 30 by 12 cm; upper pinnae gradually becoming smaller, rachis and costae sparsely scaly, stramineous; ultimate segments (4th pinnules) with a few lobes; lobes oblong, slightly falcate, acuminate at apex, entire, about 5 mm broad; herbaceous, light green. Sori usually at sinus between lobes of segments, up to 1.5 mm broad; indusia entirely covering the sori in maturity, thin, pale, round at apex .

Distribution in Thailand

NORTHERN: Chiang Mai.

Wider Distribution

SW China and Burma.

Ecology

On mossy tree trunks in dense hill evergreen forests at altitudes above 1900 m.

Similar species

Davallodes pulchra (D.Don) M.Kato & Tsutsumi

Proposed IUCN Conservation Assessment

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

Voucher specimens - Thailand

Namnuan 48, Chiang Mai (CMU); Maxwell 94-1029, Chiang Mai (CMU); Middleton et al. 4495, Chiang Mai, Doi Inthanon National Park (E); Middleton et al. 4894, Chiang Mai, Doi Inthanon National Park (E).

Habit

Habit

Habit

Habit

Rhizome

Rhizome

Frond

Frond

Pinna

Pinna

Pinna and rachis

Pinna and rachis

Lower surface of lamina and sori

Lower surface of lamina and sori

Sori

Sori

Site hosted by the Royal Botanic Garden Edinburgh. Content managed by Stuart Lindsay, Gardens by the Bay, Singapore and David Middleton, Singapore Botanic Gardens. Last updated 16 November 2016.