Ferns of Thailand, Laos and Cambodia

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Family

Dennstaedtiaceae

Nomenclature

Microlepia puberula Alderw., Bull. Jard. Bot. Buitenzorg, Ser. 2, 11: 17. 1913; Holttum, Rev. Fl. Malaya ed. 1, 2: 312, f. 179. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 20: 24. 1961; Holttum, Dansk Bot. Ark. 23: 233. 1965; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 73. 1967; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 54: 1968; Tagawa & K.Iwats., Fl. Thailand 3: 120, f. 8.3. 1979; Boonkerd & Pollawatn, Pterid. Thailand: 88. 2000.

Description

Rhizome creeping, thick, densely hairy at apex, glabrescent in the older part. Stipes stramineous, 60–100 cm long, almost glabrous throughout; lamina oblong-subtriangular or oblong with moderately acute apex, bipinnate-tripinnatisect, almost the same length as stipes, up to 50 cm wide; rachis stramineous or brown, grooved on the upper surface, rather densely pubescent on the upper portion; lateral pinnae less than 10 in pairs, the lower ones more than 15 cm apart, upper ones gradually reduced in size, the basal largest ones oblong-subtriangular, gradually narrowing towards caudately acuminate apex, distinctly stalked at base, up to 30 cm long, 20 cm wide; costae like the upper parts of rachis, densely hairy throughout; larger pinnules oblong-subtriangular, long caudate at apex, unequally cuneate at base, basal acroscopic lobes large, basiscopic ones smaller than the next anterior ones, pinnatisect, stalked at base, 8 cm long, 3 cm wide; costules densely hairy on both surfaces; ultimate lobes oblong, oblique, or spathulate in larger ones, entire or obscurely undulate at margin, round at apex; veins rather distinct and hairy below, less so above, green, papyraceous to chartaceous, hairy on the under surface of laminar parts. Sori at or a little within the margin of lobes; indusia shallowly cup-shaped, hairy .

Distribution in Thailand

NORTHERN: Chiang Mai; SOUTH-WESTERN: Kanchanaburi, Phetchaburi; PENINSULAR: Yala.

Wider Distribution

W Malesia.

Ecology

On rather dry slopes in tropical evergreen forest, or sometimes in open areas at low altitudes.

Proposed IUCN Conservation Assessment

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

	Ferns of Thailand, Laos and Cambodia
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Microlepia puberula Alderw. 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 Dennstaedtiaceae Nomenclature Microlepia puberula Alderw., Bull. Jard. Bot. Buitenzorg, Ser. 2, 11: 17. 1913; Holttum, Rev. Fl. Malaya ed. 1, 2: 312, f. 179. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 20: 24. 1961; Holttum, Dansk Bot. Ark. 23: 233. 1965; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 73. 1967; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 54: 1968; Tagawa & K.Iwats., Fl. Thailand 3: 120, f. 8.3. 1979; Boonkerd & Pollawatn, Pterid. Thailand: 88. 2000. Description Rhizome creeping, thick, densely hairy at apex, glabrescent in the older part. Stipes stramineous, 60–100 cm long, almost glabrous throughout; lamina oblong-subtriangular or oblong with moderately acute apex, bipinnate-tripinnatisect, almost the same length as stipes, up to 50 cm wide; rachis stramineous or brown, grooved on the upper surface, rather densely pubescent on the upper portion; lateral pinnae less than 10 in pairs, the lower ones more than 15 cm apart, upper ones gradually reduced in size, the basal largest ones oblong-subtriangular, gradually narrowing towards caudately acuminate apex, distinctly stalked at base, up to 30 cm long, 20 cm wide; costae like the upper parts of rachis, densely hairy throughout; larger pinnules oblong-subtriangular, long caudate at apex, unequally cuneate at base, basal acroscopic lobes large, basiscopic ones smaller than the next anterior ones, pinnatisect, stalked at base, 8 cm long, 3 cm wide; costules densely hairy on both surfaces; ultimate lobes oblong, oblique, or spathulate in larger ones, entire or obscurely undulate at margin, round at apex; veins rather distinct and hairy below, less so above, green, papyraceous to chartaceous, hairy on the under surface of laminar parts. Sori at or a little within the margin of lobes; indusia shallowly cup-shaped, hairy . Distribution in Thailand NORTHERN: Chiang Mai; SOUTH-WESTERN: Kanchanaburi, Phetchaburi; PENINSULAR: Yala. Wider Distribution W Malesia. Ecology On rather dry slopes in tropical evergreen forest, or sometimes in open areas at low altitudes. Proposed IUCN Conservation Assessment Least Concern (LC). This species is widespread and not under any 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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