Ferns of Thailand, Laos and Cambodia

Family

Hymenophyllaceae

Type Specimen Information

Trichomanes christii Copel., Philipp. J. Sci. 1(Suppl. 4): 251. 1906.

Nomenclature

Crepidomanes christii (Copel.) Copel., Philipp. J. Sci. 67: 60. 1938; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 52. 1968; Tagawa & K.Iwats., Fl. Thailand 3: 88. 1979; Tagawa & K.Iwats., Fl. Thailand 3: 613. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 69. 2000. – Trichomanes christii Copel., Philipp. J. Sci. 1(Suppl. 4): 251. 1906; Copel., Philipp. J. Sci. 51: 185, pl. 21. 1933; Holttum, Rev. Fl. Malaya ed. 1, 2: 100, f. 37. 1955 [‘1954’]. – Type: Merrill 1819, Philippines, Mindoro.

Description

Rhizome long creeping usually on branches of tree, slender, densely covered with blackish hairs, about 0.3 mm diam. Stipes not so remote, 1–5 cm apart, 0.5–1.3 cm long, hairy, winged. Laminae tripinnatifid, ovate to oblong in outline, acute to moderately acute at apex, gradually narrowing downwards, 4–6 cm long, 2–3 cm wide; pinnae about 10 in pairs, oblong to oblong-lanceolate, round at apex, broadly cuneate at sessile base, the largest ones 2 cm long, 0.8 cm wide; pinnules with 2 to 4 segments; segments lanceolate, round to moderately acute at apex, entire but undulate at margin, about 0.6 mm broad, with a single vein; false veinlets marginal, continuous or interrupted, with two rows of marginal cells, oblique false veinlets few if any. Sori one to a segment, usually in apical part of fronds; involucre tubular with dilated mouth, about 1 mm long, 0.8 mm diam., the mouth distinctly dilated, about 1.5 mm diam.

Distribution in Thailand

SOUTH-WESTERN: Kanchanaburi; PENINSULAR: Ranong, Yala.

Wider Distribution

Sumatra and Peninsular Malaysia to the Philippines.

Ecology

On branches ot trees in evergreen forest at low altitudes.

Proposed IUCN Conservation Assessment

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

Notes

Holttum in Ferns of Malaya says this species does not have a winged stipe but the material we have seen from Thailand does.

Voucher specimens - Thailand

Middleton et al. 4771, Kanchanaburi, Thung Yai Naresuan Wildlife Sanctuary (E).

	Ferns of Thailand, Laos and Cambodia
Home \| Species Index \| Glossary
Crepidomanes christii (Copel.) Copel. Family Hymenophyllaceae Type Specimen Information Trichomanes christii Copel., Philipp. J. Sci. 1(Suppl. 4): 251. 1906. Nomenclature Crepidomanes christii (Copel.) Copel., Philipp. J. Sci. 67: 60. 1938; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 52. 1968; Tagawa & K.Iwats., Fl. Thailand 3: 88. 1979; Tagawa & K.Iwats., Fl. Thailand 3: 613. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 69. 2000. – Trichomanes christii Copel., Philipp. J. Sci. 1(Suppl. 4): 251. 1906; Copel., Philipp. J. Sci. 51: 185, pl. 21. 1933; Holttum, Rev. Fl. Malaya ed. 1, 2: 100, f. 37. 1955 [‘1954’]. – Type: Merrill 1819, Philippines, Mindoro. Description Rhizome long creeping usually on branches of tree, slender, densely covered with blackish hairs, about 0.3 mm diam. Stipes not so remote, 1–5 cm apart, 0.5–1.3 cm long, hairy, winged. Laminae tripinnatifid, ovate to oblong in outline, acute to moderately acute at apex, gradually narrowing downwards, 4–6 cm long, 2–3 cm wide; pinnae about 10 in pairs, oblong to oblong-lanceolate, round at apex, broadly cuneate at sessile base, the largest ones 2 cm long, 0.8 cm wide; pinnules with 2 to 4 segments; segments lanceolate, round to moderately acute at apex, entire but undulate at margin, about 0.6 mm broad, with a single vein; false veinlets marginal, continuous or interrupted, with two rows of marginal cells, oblique false veinlets few if any. Sori one to a segment, usually in apical part of fronds; involucre tubular with dilated mouth, about 1 mm long, 0.8 mm diam., the mouth distinctly dilated, about 1.5 mm diam. Distribution in Thailand SOUTH-WESTERN: Kanchanaburi; PENINSULAR: Ranong, Yala. Wider Distribution Sumatra and Peninsular Malaysia to the Philippines. Ecology On branches ot trees in evergreen forest at low altitudes. Proposed IUCN Conservation Assessment Least Concern (LC). This species is widespread and not under any immediate known threat. Notes Holttum in Ferns of Malaya says this species does not have a winged stipe but the material we have seen from Thailand does. Voucher specimens - Thailand Middleton et al. 4771, Kanchanaburi, Thung Yai Naresuan Wildlife Sanctuary (E). Habit Frond and sori Frond apex with sori in involucres
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 24 January 2012

Crepidomanes christii (Copel.) Copel.