Taxonomic Diversity of Angiosperms in Rajshahi Region

Abstract

Taxonomic diversity of angiosperms in Rajshahi region, Bangladesh was carried through from November 2015 to October 2020. Spacious floristic surveys of angiosperms and collection have been made throughout the area of studied. With everything taken into consideration 725 of species along with 482 genera within 125 families were recorded. Overall the observed data habit analysis shows that herbs, shrubs, climbers and trees are represented by 50%, 15%, 13% and 22% species respectively. In the recorded species, Magnoliopsida (Dicotyledones) is expressed by 585 (81%) under 379 genera and 102 families while Liliopsida (Monocotyledones) is expressed by 140 (19%) species under 103 genera and 23 families. The distribution of angiosperm species in the families shows variation. Asteraceae is the dominant family disclosed by 52 species, followed by Poaceae (44 species), Fabaceae (43 species), Euphorbiaceae (37 species), Cucurbitaceae (25 species), Caesalpiniaceae (22 species), Apocynaceae (19 species), Acanthaceae (18 species), Malvaceae (18 species), Mimosaceae (17 species), Lamiaceae (17 species), Verbenaceae (17 species), Amaranthaceae (16 species), Solanaceae (16 species), Araceae (16 species), Moraceae (12 species), Convolvulaceae (12 species), Liliaceae (12 species), Scrophulariaceae (11 species), Arecaceae (11) species, Cyperaceae (11 species), Brassicaceae (10 species), Bignoniaceae (10 species), Rubiaceae (10 species). A single species is displayed by 61 families while 2 to 9 species are represented by 49 families. For each species, local name, scientific name, habit, the status of occurrence, voucher number, flowering time and medicinal uses were recorded. Also presented clustering of 725 plant species (habit diversity) in a simple flat dendrogram.