Crepidomanes latemarginale (D.C.Eaton) Copel.

Family

Hymenophyllaceae

Nomenclature

Crepidomanes latemarginale (D.C.Eaton) Copel., Philipp. J. Sci. 67: 60. 1938; Ching, Fl. Reipubl. Popularis Sin. 2: 164. 1959; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 42. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 91. 1979; Tagawa & K.Iwats., Fl. Thailand 3: 613. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 70. 2000. – Trichomanes latemarginale D.C.Eaton, Proc. Amer. Acad. Arts 4: 111. 1858; Copel., Philipp. J. Sci. 51: 189, pl. 24. 1933, p.p. major; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 63. 1939; Holttum, Rev. Fl. Malaya ed. 1, 2: 101. 1955 [‘1954’].

Trichomanes nanum auct. non Bosch: Christ, Bot. Tidsskr. 24: 103. 1901.

Trichomanes parvulum auct. non Poir.: E.Smith, J. Siam Soc. Nat. Hist. Suppl. 8: 2. 1929.

Description

Rhizome very slender, densely covered with short brownish hairs. Stipes about 0.5–1 cm apart, 2–4 mm long, very narrowly winged in the upper part, hairy especially in the basal part. Laminae almost circular to oblong-subdeltoid in outline, less than 2 cm long, 1.2 cm wide, often digitate in appearance but typically pinnate in branching; segments 5–12, linear-lanceolate, round to moderately acute at apex, entire but sometimes obscurely crisped at margin, with a single vein, 1–1.2 mm wide; false veinlets marginal, continuous, with one or two rows of marginal cells outside the false veinlets, oblique striae present or absent. Sori sunk in the apices or segments; involucre tubular with bilabiate mouth, about 1 mm long, 0.8 mm diam., the mouth just wider than the segments.

Distribution in Thailand

NORTH-EASTERN: Loei; SOUTH-WESTERN: Phetchaburi; SOUTH-EASTERN: Chanthaburi; PENINSULAR: Surat Thani, Trang.

Wider Distribution

NE India to S China, Taiwan, south to Peninsular Malaysia.

Ecology

On muddy or mossy rocks in mixed or in evergreen forest at medium altitudes.

Proposed IUCN Conservation Assessment

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

Voucher specimens - Thailand

Geesink et al. 6914, Chaiyaphum, Ban Nam Phrong (P); Middleton et al. 3329, Phetchaburi (E).

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