Ferns of Thailand, Laos and Cambodia

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Family

Hymenophyllaceae

Nomenclature

Didymoglossum exiguum (Bedd.) Copel., Philipp. J. Sci. 67: 78. 1938; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 40. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 96, f. 5.12. 1979. – Hymenophyllum exiguum Bedd., Ferns Brit. India: t. 275. 1868. – Trichomanes exiguum (Bedd.) Baker, Syn. Fil.: 464. 1874; Bedd., Handb. Ferns Brit. India: 37. 1883; Copel., Philipp. J. Sci. 51: 205, pl. 32, f. 1–2. 1933; Holttum, Rev. Fl. Malaya ed. 1, 2: 94, f. 31. 1955 [‘1954’]; Tagawa & K.Iwats., Fl. Thailand 3: 614. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 75. 2000.

Description

Rhizome slender, less than 0.1 mm diam., densely covered with brownish hairs. Fronds simple, lanceolate or oblong-lanceolate, round or moderately acute at apex, cuneate at base, 5–7 (–10) mm long, less than 3 mm broad, the margin subentire, hairy with brownish stellate hairs; costae simple, continuous to the apex, not branching; false veinlets numerous, oblique, variously branching. Sori solitary at the apex of frond, half immersed; involucre tubular with dilated mouth, about 1.5 mm long, 0.7 mm diam., the mouth 0.8 mm diam.

Distribution in Thailand

SOUTH-EASTERN: Chanthaburi; PENINSULAR: Nakhon Si Thammarat, Trang.

Wider Distribution

Sri Lanka, S India and Peninsular Malaysia.

Ecology

On moist mossy rocks in dense evergreen forest.

Proposed IUCN Conservation Assessment

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

	Ferns of Thailand, Laos and Cambodia
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Didymoglossum exiguum (Bedd.) Copel. Warning: count(): Parameter must be an array or an object that implements Countable in C:\Data\serverroots\htdocs\ThaiFerns\factsheets\functions.php on line 17 Family Hymenophyllaceae Nomenclature Didymoglossum exiguum (Bedd.) Copel., Philipp. J. Sci. 67: 78. 1938; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 40. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 96, f. 5.12. 1979. – Hymenophyllum exiguum Bedd., Ferns Brit. India: t. 275. 1868. – Trichomanes exiguum (Bedd.) Baker, Syn. Fil.: 464. 1874; Bedd., Handb. Ferns Brit. India: 37. 1883; Copel., Philipp. J. Sci. 51: 205, pl. 32, f. 1–2. 1933; Holttum, Rev. Fl. Malaya ed. 1, 2: 94, f. 31. 1955 [‘1954’]; Tagawa & K.Iwats., Fl. Thailand 3: 614. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 75. 2000. Description Rhizome slender, less than 0.1 mm diam., densely covered with brownish hairs. Fronds simple, lanceolate or oblong-lanceolate, round or moderately acute at apex, cuneate at base, 5–7 (–10) mm long, less than 3 mm broad, the margin subentire, hairy with brownish stellate hairs; costae simple, continuous to the apex, not branching; false veinlets numerous, oblique, variously branching. Sori solitary at the apex of frond, half immersed; involucre tubular with dilated mouth, about 1.5 mm long, 0.7 mm diam., the mouth 0.8 mm diam. Distribution in Thailand SOUTH-EASTERN: Chanthaburi; PENINSULAR: Nakhon Si Thammarat, Trang. Wider Distribution Sri Lanka, S India and Peninsular Malaysia. Ecology On moist mossy rocks in dense evergreen forest. Proposed IUCN Conservation Assessment Least Concern (LC). This species is widespread and not under any immediate known threat. Warning: count(): Parameter must be an array or an object that implements Countable in C:\Data\serverroots\htdocs\ThaiFerns\factsheets\functions.php on line 17
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