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The Genus Microlepia Presl (dennstaedtiaceae) from Bangladesh

Momtaz Mahal Mirza
Bangladesh National Herbariumm, Chiriakhana Road, Mirpur-1, Dhaka-1216, Bangladesh

Abstract/ Executive Summary:

The paper deals with the genus Microlepia Presl of the family Dennstaedtiaceae, which includes 4 species, namely, M. hookeriana (Wall. ex Hook.) Presl, M. strigosa (Thunb.) Presl, M. speluncae (L.) Moore and M. hancei Prantl from Bangladesh, of which last one is a new record.

Keywords: Microlepia, Dennstidiaceae, Pteridophyte, New record, Bangladesh

Location: Bangladesh National Herbarium (DACB), Kew Herbarium (K) and also Central National Herbarium (CAL)

Start Date:

End Date:

Program Area: Conservation and Biodiversity

Commodity: Plant

Objectives:

To determine the Genus Microlepia Presl (Dennstaedtiaceae) from Bangladesh

Methodology:

The present work was based on the material deposited at Bangladesh National Herbarium (DACB), Kew Herbarium (K) and also Central National Herbarium (CAL), for taxonomic study of the species, and to evaluate the number of members of the family in Bangladesh. The taxonomic description with keys to the species, illustrations, specimens examined, distribution, short notes and proposal for present conservation measures are given below. Microlepia Presl, Tent. Pterid.: 124 (1836). Lectotype : Microlepia polypodiodes (Sw.) Presl (= Dicksonia polypodiodes Sw.) Terrestrial, rhizome short or long creeping, profusely branched and covered with deciduous hairs. Fronds generally large, simple, pinnate or variously compound. Stipe continuous with the rhizome, long, cylindrical usually covered with short hairs; rachis shallowly grooved, costae of pinnules slightly grooved, ultimate pinnules obliquely incised, usually hairy; texture herbaceous, thin. Veins free. Sori intermarginal, terminal base, receptacle short, annulus of 16-20 cells, straight and interrupted, succession of sporangia gradate or more or less mixed; spores tetrahedral, smooth or tuberculate. Microlepia is a genus of worldwide distribution, but mainly Asiatic. They are usually grown in restricted to deeply shaded, moist localities, forming small colonies in well protected areas in the plains and hills of low elevations.

Source of Information: Bangladesh J. Plant Taxon. 13(1): 21-28, 2006 (June)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

M. strigosa is not common like M. speluncae, but grows well and forms thickets in open places by the road side, village jungles and forest floor. The taxon is being destroyed by the grazing animals as well as by the habitat destruction. Therefore, both insitu and ex- situ conservation measures should be undertaken.

Knowledge Management: Journal