Davallia perdurans Christ
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.
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.
SW China and Burma.
On mossy tree trunks in dense hill evergreen forests at altitudes above 1900 m.
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).
Pinna and rachis
Lower surface of lamina and sori
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