Crepidomanes parvifolium (Baker) K.Iwats.

Family

Hymenophyllaceae

Nomenclature

Crepidomanes parvifolium (Baker) K.Iwats., J. Fac. Sci. Univ. Tokyo, Sect. 3, Bot. 13: 535. 1985; Tagawa & K.Iwats., Fl. Thailand 3: 613. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 72. 2000. – Microgonium parvifolium (Baker) Tagawa & K.Iwats., Acta Phytotax. Geobot. 26: 169. 1975; Tagawa & K.Iwats., Fl. Thailand 3: 93. 1979. – Hymenophyllum parvifolium Baker, J. Linn. Soc. Bot. 9: 340, pl. 8, f. E. 1866; Bedd., Handb. Ferns Brit. India: 28, f. 14. 1883. – Trichomanes parvifolium (Baker) Copel., Philipp. J. Sci. 51: 211. 1933; Tagawa & K.Iwats., Acta Phytotax. Geobot. 24: 178, f. 5.9. 1970. – Type: Moulmein (Burma); on trees and rocks, road from Moulmein to Myawaddee, Feb. 1862, Rev. C. Parish (isotype E, image: http://data.rbge.org.uk/herb/E00413867).

Microgonium minutifolium Tagawa & K.Iwats., Acta Phytotax. Geobot. 22: 98, f. 2. 1967; SouthE. Asian Stud. 5: 39. 1967.

Crepidomanes sp.: Tagawa & K.Iwats., Southeast As. St 3(3): 74. 1965, p.p.

Description

Rhizome c. 0.15 mm diam., densely covered with brownish hairs 0.1–0.2 mm long. Stipes terete, 0.5–1.5 mm long, more slender than rhizome, glabrous or with caducous hairs like those on rhizome. Fronds small, at most 6 mm long including stipes, simple and lanceolate, or dichotomous or pinnatifid in plan, simple lamina or ultimate segments oblong-lanceolate, round at apex, entire on margin, 1.5–3 mm long, 0.7–1 mm broad, with simple distinct veins; pseudo-veinlets several on a segment, oblique; laminar cells 25–40 ? diam., cell walls thick but straight. Sori solitary, terminal on ultimate segment, involucre obconic, tubular, 0.8–1.2 mm long, irregularly hairy with coarse hairs about 0.1 mm long; the mouth bilabiate, about 0.5 mm long, subtriangular, moderately acute at apex .

Distribution in Thailand

SOUTH-EASTERN: Chanthaburi; PENINSULAR: Trang.

Wider Distribution

Burma.

Ecology

On damp rocks in moist places in dense forest at medium or high altitudes.

Proposed IUCN Conservation Assessment

Least Concern (LC). Although this species is known only from two sites in Thailand and its distribution and status in Burma are unknown the two localities in Thailand are in protected areas and there are no known threats.

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