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Title: Taxonomic and Spores Morphological Studies of the Pteridophytes of District Swabi, Pakistan
Authors: Irfan, Muhammad
Keywords: Biological & Medical Sciences
Issue Date: 2021
Publisher: Abdul Wali Khan University, Mardan
Abstract: In current study an attempt has been made to document the floristic diversity, geographical distribution, occurrence, taxonomy and spore morphology of Pteridophytes belong to District Swabi, Pakistan. Detailed descriptions of taxa, habitat ecology, general distribution and specimens examined in different herbaria from Pakistan were documented. Previous literature was consulted in order to confirm the nomenclature, spore morphology and other attributes of this unique group of plants. Many field trips were undertaken in various localities of District Swabi, Pakistan and specimens of various herbaria were studied in Pakistan, United States and virtually in United Kingdom. Our study confirmed 49 taxa belonging to 24 genera and 11 families. Pteridaceace is found to be largest family with 16 taxa (32.65%), Dryopteridaceae is the second largest family with 8 taxa (16.33%), followed by Aspleniaceae with 7 taxa (14.28%). Asplenium is the largest genus with 7 taxa (14.28%), Adiantum, Pteris, Dryopteris and Polystichum are the second largest genera with 4 taxa each (32.65%), followed by Aleuritopteris, Cystopteris, Diplazium, Equisetum, Oeosporangium, Onychium and Pseudophegopteris with 2 taxa each (28.57%). Phytogeographically Sino-Himalayan element is the major component of the diversity of the pteridophyes with 20 taxa (40.82%), 9 taxa (18.37%) are cosmopolitan and South East Asian (Malesian) element have 4 taxa (8.16%). It has been found that 22 taxa (44.9%) are abundant, 19 taxa (34.69%) are common and 7 taxa (14.28%) are infrequent. Concerning spore morphology Lygodiaceae, Marsileaceae, Pteridaceace and Selaginellaceae were with trilete, triangular spores in proximal and distal view, ellipsoidal and hemicircular in equatorial view, polar proximal and polar distal surface was with cristate, granulose, reticulate, perforate and tuberculate ornamentation, while Athyriaceae, Aspleniaceae, Dennstaedtiaceae, Dryopteridaceae, Equisetaceae, Hypodematiaceae and Thelypteridaceae have monolete, ellipsoidal, spheroidal spores with bilateral symmetry in proximal and distal view, ellipsoidal and hemicircular in equatorial view, perispore ornamentation was alate, costate; costate-alate, with lophate, perforate, reticulate, rugate, tuberculate and verrucate surface.
Gov't Doc #: 24959
Appears in Collections:PhD Thesis of All Public / Private Sector Universities / DAIs.

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