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This study demonstrates that the vascular flora (Pteridophytes, Gymnosperms, and Monocotyledons) of the Chapainawabganj district area consists of 247 species with two subspecies under 126 genera and 35 families. The pteridophytes and gymnosperms are represented by 19 and four species, respectively, whereas the monocotyledons (Liliopsida) are represented by 224 species. Poaceae, with 91 species, representing 36.84% of the flora, appears to be the largest family, followed by Cyperaceae 32, Araceae 19, Asparagaceae 12, and Arecaceae 11, which collectively constitute ca. 30% of this flora. Cyperus, comprising 18 species, is recorded as the largest genus, followed by Fimbristylis, Digitaria, Panicum, Bambusa, Urochloa, Dracaena, and Dioscorea. About 87.55% of this flora's taxa are herbs, 4.42% are palms, 3.61% are shrubs, and the rest are bamboos and trees. Erect herbs, forming 61.04% of the flora, comprise the most common life form. In this flora, almost 74.30% of the taxa are native, and the rest, 25.70%, are exotic. It is found that nearly 74.70% of the taxa are wild, 14.06% are planted, and 11.24% are cultivated. About 23.29% of taxa commonly occur throughout all upazilas in this district. Most of the species are harboured in fallow lands, roadsides, gardens, and homesteads. All species of this district's flora are known to be economically useful. Most of its habitats and ecosystems are exposed to different threats. Adequate measures with effective management plans should be adopted and implemented for the sustainable use, improvement, and conservation of this precious flora. [ABSTRACT FROM AUTHOR]

In this study, the vascular flora of the Lalmai hill area of the Cumilla district has been thoroughly explored. This study reveals the occurrence of 923 species of vascular plants under 594 genera and 141 families in the study area, which represents 23.75% of the total 3886 plant species reported from Bangladesh until now. About 68.15% of these species are native and 31.85% are exotic to Bangladesh. Pteridophytes are represented by 30 species belonging to 21 genera and 11 families, whilst Gymnosperms are represented by eight species under seven genera and six families. Magnoliopsida (dicotyledons) comprises 661 species, including four subspecies and two varieties, from 429 genera and 96 families, accounting for 71.54% of the vascular flora of the study area. Liliopsida (monocotyledons) represents 225 species under 137 genera and 28 families, making up 24.35% of this flora. In Magnoliopsida, Fabaceae with 55 species is the largest dicot family, followed by Asteraceae, Malvaceae, Euphorbiaceae, Lamiaceae and Rubiaceae. Most of the species of Liliopsida (68%) are represented by the five families viz., Poaceae, Cyperaceae, Araceae and Commelinaceae. Poaceae with 75 species is the largest monocot family, followed by Cyperaceae, Orchidaceae, Araceae and Arecaceae. The genus Cyperus is the largest in the study area. The species Antidesma roxburghii Wall. ex Tul. of Phyllanthaceae is rediscovered in Bangladesh. Most of the Magnoliopsida and Liliopsida are herbs (59.80%), which are followed by trees (21.02%), shrubs (17.23%), and palms (1.41%). About 64.57% of the species are recorded as wild, but a significant percentage (27.41%) is planted and cultivated (8.02%). The majority of the species are found to grow in eight categories of habitat viz., roadside, fallow land, homestead, woodland, garden, scrub jungle, agricultural field and grassland. Eight plant species, listed in the Red Data Book of Bangladesh including six as Data Deficient (DD), one Not Evaluated and one Endangered (EN) species, are harboured in the study area. We strongly recommend the adoption of a master plan for minimizing all major threats to the vegetation and habitats of this area and sustainable development, utilization and conservation of its plant resources. [ABSTRACT FROM AUTHOR]

This survey provides the basic taxonomic data on the vascular flora of the disaster-prone coastal district of Bagerhat. it has explored the occurrence of 964 species of vascular plants under 607 genera and 147 families in this district. About 68.88% of these species are native and 31.12% are exotic to Bangladesh. Pteridophytes are composed of 32 species under 22 genera of 14 families and Gymnosperms of seven species under six genera and five families. Angiosperms are comprised of 693 species of 450 genera and 99 families of Magnoliopsida (dicotyledons) that represent 71.89% of the flora, and 232 species belonging to 129 genera under 29 families of Liliopsida (monocotyledons) that constitute 24.07% of this flora. Fabaceae with 58 species is the largest dicot family, followed by Asteraceae, Euphorbiaceae, Apocynaceae, and Acanthaceae. Poaceae with 68 species is the largest monocot family, followed by Cyperaceae, Orchidaceae, Araceae and Arecaceae. The genus Cyperus is the largest in the study area, which is followed by Fimbristylis, Euphorbia, Ficus, Solanum and Ipomoea. The species Cipadessa baccifera (Roth) Miq. of Meliaceae is rediscovered in Bangladesh. About 63.35% of species of this flora and most of the Magnoliopsida and Liliopsida are herbs, 18.94% shrubs, 15.63% trees, and 1.55% palms. Nearly 70.81% of the species are wild and the rest are planted or cultivated. 17 species are recognized as rare in the study area due to their very restricted occurrence and poor regeneration. Most of the species grow in the fallow lands, roadsides, woodlands, homesteads, marginal lands and scrub jungles. The majority of the species have more than one uses, but most are useful as medicinals (70.39%) and ornamentals (25.57%). Though the study area is under the stress of different threats, its floristic composition is still rich. We strongly recommend adopting adequate effective measures for the conservation and sustainable development of this rich flora of the coastal region. [ABSTRACT FROM AUTHOR]

This study demonstrates that the vascular flora of the Rangpur district area consists of 825 species under 537 genera and 139 families. The pteridophytes and gymnosperms are represented by 25 and seven species, respectively, whereas the angiosperms by 793 species including 582 species of dicotyledons (Magnoliopsida) and 211 species of monocotyledons (Liliopsida). Poaceae with 67 species, representing 8.12% of the flora, is appeared as the largest family, and followed by Asteraceae, Fabaceae, Araceae, Malvaceae and Euphorbiaceae that collectively constitute 17.94% of this flora. Persicaria comprising 10 species is recorded as the largest genus, and followed by Ficus, Euphorbia, Solanum, Albizia and Brassica. About 59.71% taxa of this flora are herbs, 21.71% trees, 14.72% shrubs and the rest are palms, lianas, and bamboos. Erect herbs forming 35.22% of the flora comprise the most common life-form. In this flora, almost 64.29% taxa are native and the rest 35.71% are exotic. Nearly 62.61% taxa of the flora are found in wild, 26.90% as planted and 10.49% as cultivated. About 35.46% of the species commonly occur throughout all upazilas of this district. Most of the species are harboured in fallow lands, roadsides, gardens, and homesteads. All species of this district flora are known as economically useful. Most of its habitats and ecosystems are exposed to different threats. Adequate measures with effective management plans should be adopted and implemented for the sustainable use, improvement and conservation of this precious flora. [ABSTRACT FROM AUTHOR]

This study presents elementary taxonomic data on the composition of vascular flora in the disaster prone coastal district Satkhira of Bangladesh. The results of this study show that this district houses 664 species under 468 genera and 133 families of vascular plants. The Pteridophytes and Gymnosperms are represented by 21 and five species, whereas, the Magnoliopsida (dicotyledons) and Liliopsida (monocotyledons) of Angiosperms by 494 and 144 species, respectively. About 59.64% of these species are herbs, 15.96% shrubs, 21.69% trees, 2.26% palms and 0.45% bamboos. Total 73.04% of the species are wild, 19.88% planted and 7.08% cultivated. In this area, Fabaceae with 31 species is the largest family, followed by Asteraceae with 27 species, Apocynaceae with 26 species and Malvaceae with 25 and Acanthaceae with 22 species. Ficus with seven species is recorded as the largest genus, which is followed by Solanum, Hygrophila, Euphorbia, Senna, Phyllanthus, Ipomoea, Hibiscus and Alternanthera. Most of the species are found in fallow lands, roadsides, woodlands, homesteads and scrub jungles and useful as medicine, ornamental, fibre, fruit, livestock feed, soil binder and timber. The floristic composition of this district is still rich, though most of its habitats and ecosystems are vulnerable to natural disasters. Effective conservation plan and measures should be adopted for the precious flora of this coastal district. [ABSTRACT FROM AUTHOR]

This study provides the taxonomic data on 168 plant species belonging to 96 genera and 23 families of Liliopsida (monocotyledons) extant in Narsingdi district of Bangladesh. These species are mostly comprised of herbs (90.48%), followed by trees and shrubs (4.76% each). Poaceae with 66 species under 37 genera is the best represented family, followed by Cyperaceae with 26 species of seven genera, Araceae with 16 species of 11 genera, Commelinaceae with 11 species of four genera and Arecaceae with 10 species of eight genera. Cyperus with 13 species appears as the largest genus, which is followed by Panicum with nine species, Digitaria with six species, and Commelina and Dioscorea with five species each. The six upazilas of this district are 39.77% similar in the species composition of their Liliopsida, but the similarity between the pairs of upazilas varies from 6.45% to 32.31%. Roadside and fallow land habitats share the highest similarity (36.84%) in species composition. Total 117 species are distinguished as economically useful. This study suggests for implementation of necessary measures in order to minimize the major threats to this plant group and to favor its sustainable development in the study area. [ABSTRACT FROM AUTHOR]

This study provides basic taxonomic data on Liliopsida (monocotyledons) and Pteridophyta of the representative homestead areas of Dhaka, Gazipur, Manikganj and Tangail districts of Bangladesh. The monocotyledons and pteridophytes, growing naturally in the homstead areas, are composed of total 137 and 16 species under 84 and 13 genera belonging to 22 and seven families, respectively. A total of 20, 13, 19 and 17 species respectively, occur exclusively in the homesteads of Dhaka, Gazipur, Manikganj and Tangail districts and only 22 species are common there. Poaceae with 53 species is the largest family and Cyperus with 12 species is the largest genus in monocotyledons. Pteridaceae with eight species and Pteris with three species are the better represented family and genus, respectively in pteridophytes. Total 136 species are appeared as herbs that are followed by 11 species of trees and six species of shrubs. A total of 119 species are documented as economically useful. This study identifies a number of active threats to the flora of the study area, and suggests to launch adequate management and awareness building programs for the homestead people in order to ensure effective conservstion and sustainable use and development of plant genetic resources in the homestead areas of this region. [ABSTRACT FROM AUTHOR]

A taxonomic study on the flora of Dohar upazila (sub-district) under Dhaka district has been conducted that results in occurrence of 204 angiosperm taxa under 165 genera and 68 families. Magnoliopsida is represented by 158 taxa distributed in 129 genera and 53 families. In contrast, Liliopsida is constituted by 46 taxa under 36 genera and 15 families. Asteraceae appears to be the largest family in Magnoliopsida consisting of 16 species, whereas Poaceae is the largest family with 16 species in Liliopsida. In Magnoliopsida, 23 families are represented by a single species, while in Liliopsida, 7 families are symbolized by a single species. Vegetation analysis shows that herbs are represented by 133 taxa, shrubs by 23 and trees by 48 taxa. Dichotomous bracketed keys to the families, genera, species and varieties are provided for easy identification of the taxa. Each taxon is supplemented by updated nomenclature, habit and representative specimen. [ABSTRACT FROM AUTHOR]

The study revealed the occurrence of 528 species of vascular plants belonging to 356 genera and 111 families in the Sundarban Mangrove Forest of Bangladesh. Among these species, 24 were pteridophytes and the rest were angiosperms, of which only 24 were true mangroves and 70 were mangrove associates. Magnoliopsida and Liliopsida were represented by 373 and 131 species, respectively. These species belonged to 345 herbs, 89 shrubs and 94 trees. Sixty-four species were climbers, 14 were epiphytes, 6 were parasites, and 7 were palms. The species number per family varied from 1 to 42. In pteridophytes, Pteridaceae with 4 genera and 5 species was the largest family. In angiosperms, Fabaceae with 24 genera and 42 species and Poaceae with 27 genera and 42 species were the largest families, respectively, in Magnoliopsida and Liliopsida. Most of the species included in this checklist were found in oligohaline zone, Sarankhola range and the forest margins, and recognized as economically important. Eleven species categorized as threatened in Bangladesh were found to occur in this mangrove forest. [ABSTRACT FROM AUTHOR]

A systematic floristic study of Rampahar reserve forest under Rangamati district in Bangladesh has revealed 89 monocot (Liliopsida) taxa belonging to 66 genera under 15 families. Out of these recorded taxa, 73 are herbs, 9 climbers, 3 bamboos, 3 reeds and 1 tree species. The area harbours 11 threatened species of the country. Updated nomenclature with full reference citation, habit and representative specimen have been provided for each species. Well known synonyms and local name(s) have also been given in some cases [ABSTRACT FROM AUTHOR]

In the present paper additional occurrence of 100 species in 75 genera under 40 angiosperm families in the Runctia Sal Forest of Sherpur district is reported. Of these, 71 species in 56 genera are from Magnoliopsida (Dicots) and 29 species in 19 genera are from Liliopsida (Monocots). These species exhibit in diverse life forms in the area, viz., 54 species are herbs, 21 species shrubs, 12 species climbers and 13 trees. Holigarna longifolia is threatened in the Sal forest area which needs to give conservation priorities. An enumeration of the species recorded is presented with important synonyms, Bengali names, habit, habitat and representative specimens. [ABSTRACT FROM AUTHOR]