Bangladesh Journal of Plant Taxonomy

A New Species of Pinguicula (Lentibulariaceae) from Western Yunnan, China

2023-12-21T04:02:31+00:00

A new species of Lentibulariaceae, Pinguicula gongshanensis, is described and illustrated from western Yunnan, China. Morphologically, it is similar to Pinguicula alpina but differs from the latter by its corolla with 8–12 brown stripes on the tube and spur, yellow corolla lip, corolla tube with yellow pubescence inside, glandular pilose pedicel, and calyx.

Bangladesh J. Plant Taxon. 30(2): 171-174, 2023 (December)

New Records of Lichens from Khadimnagar National Park Sylhet, Bangladesh. I.

2023-12-21T04:55:58+00:00

An investigation was carried out from January 2021 to December 2022 to study the lichen flora of Khadimnagar National Park. The present paper deals with 10 new records of lichens, namely, Acanthothecis asprocarpa (A.W. Archer) A.W. Archer, Bacidia absistens (Nyl.) Arnold, Caloplaca cinnabarina (Ach.) Zahlbr., Coenogonium implexum Nyl., Dirinaria leopoldii (Stein) D. D. Awasthi, Echinoplaca campanulata Kalb & Vězda, Metamelanea umbonata Henssen, Pyrgillus javanicus (Mont. & Bosch) Nyl., Ramboldia blastidiata Kantvilas & Elix and Trypethelium ochroleucum (Eschw.) Nyl. Detailed taxonomic description of the newly reported species with photographs are provided.

Bangladesh J. Plant Taxon. 30(2): 175-183, 2023 (December)

Anatomical Structures of Saskatoon Berry (Amelanchier Medik.)Leaves Under Different Cultivation Conditions

2023-12-21T05:11:05+00:00

AmelanchierMedik. belonging to the family Rosaceae includes about 30 species with a high content of biologically active substances. The aim of the study was to determine the morpho-anatomical features of leaves at the adaptation and ontogenesis stages of Saskatoon berry variety ‘Krasnoyarskaya’ (A. alnifolia) and variety ‘Prince William’ (A. canadensis). Saskatoon berry leaves are characterized by hypostomatic and anomocytic, less often anisocytic stomata at all stages of ontogenesis. The study revealed in the average length of the polar axis and the stomata equatorial diameter, depending on the cultivation conditions and genotype. A. canadensis had a larger average stomatal area, a thicker epidermis, a greater height of the palisade chlorenchyma cells, and a higher coefficient of palisade, which made it more resistant to changes in atmospheric precipitation, at all stages of ontogenesis, in comparison A. alnifolia.

Bangladesh J. Plant Taxon. 30(2): 185-193, 2023 (December)

Elodea Canadensis Michx. (Hydrocharitaceae)- A New Angiospermic Record for Bangladesh

2023-12-21T05:33:41+00:00

A new angiospermic record, Elodea canadensisMichx. iselaborated with illustration. The detailed taxonomic description of the species with other relevant information are provided here. The present species has been collected from Hakalukihaor of Moulvibazar district of greater Sylhet.

Bangladesh J. Plant Taxon. 30(2): 195-200, 2023 (December)

Anatomy, Pollen and Seed Morphology of Endemicspecies Verbascum Globiferumhub.-Mor. and V. Lysiosepalum Hub.-Mor. (Scrophulariaceae)In Diyarbakir, Turkey and Their Taxonomic Importance

2023-12-21T05:47:29+00:00

Verbascum globiferumHub.-Mor. and V. lysiosepalum Hub.-Mor.are endemic to Turkey which is a center of endemism for Verbascum species. This study gives the anatomical, palynological and seed micromorphological features of V. globiferum and V. lysiosepalumwhich grow in Diyarbakır.The xylem elements occupy a large area in the root cross-sections of the species. In stem cross-sections, the upper part of the epidermis cells is surrounded by a separate cuticle layer and the pith region covers a large area. In the leaves, the main vein is shapped as collateral bundle. Pollen grains are tricolporate-tricolpate, oblate-spheroidal, and exine ornamentation is reticulate. Seeds are brown and oblong-ovate to prismatic and alveolate. The seed coat ornamentation is irregular with polygonal cells, with densely, distinct vesicles.The capsules are pubescent, covered with stellate and branched hairy or glandular hairs.The seed displayed that substantial taxonomic understanding can be acquired from examining the seed characteristics of Verbascum, particularly at the species level.

Bangladesh J. Plant Taxon. 30(2): 201-212, 2023 (December)

Molecular Phylogenetics and Molecular Dating of Arecaceae In Bangladesh Inferred from Matk and Rbcl Genes

2023-12-21T06:04:16+00:00

A molecular phylogenetic investigation was undertaken for 30 species belonging to 15 genera of the palm family Arecaceae in Bangladesh to infer evolutionary relationships and molecular dating utilizing plastid-based matK and rbcL genes through multifaceted-algorithm driven approaches with Neighbor-Joining, Maximum-Likelihood, and Bayesian Inference methods. The study revealed that matK has better species discrimination efficiency than rbcL gene due to its highly variable nature. Transition/transversion bias test corroborated this finding as matK showed higher bias (2.632) than rbcL (2.235). Nucleotide substitution patterns were visualized via HYPERMUT program, which unveiled higher variability in matK and lower variability in rbcL alignment. Phylogenetic trees constructed with matK revealed monophyletic nature of origin for all the three subfamilies, viz. Arecoideae, Coryphoideae and Calamoideae, while rbcL trees exhibited polyphyly for Coryphoideae and monophyly for Arecoideae and Calamoideae. All the nine tribes belonging to three subfamilies demonstrated monophyletic nature in matK trees. Bootstrap support and Bayesian posterior probability were found to be higher in matK topologies than that of rbcL. The molecular clock test unraveled an equal evolutionary rate for matK and unequal rate for rbcL sequences. Molecular dating approach unveiled Calamoideae to be the most ancient subfamily (65.75 MYA) among the three subfamilies that originated during the Late Cretaceous period in the Mesozoic era, whereas Coryphoideae and Arecoideae were found to have originated in the Cenozoic era.

Bangladesh J. Plant Taxon. 30(2): 213-232, 2023 (December)

Floral Richness And Seasonalityof Phytodiversity In The Tessala Mountains, Western Algeria

2023-12-21T06:17:55+00:00

This work is devoted for the floral richness and seasonality evaluation of the plant communities of the Tessala Mountains in Western Algeria. The floristic inventory of the 30 surveys carried out on 10 selected stations has resulted in 152 species under 125 genera and 48 families. Seasonal floral richness is concentrated in both spring and summer seasons, while the monthly richness is significant between Marchto August. Vegetations formations are represented physiognomically by four strata, taken into consideration in descending order of importance: Herbaceous (68%), shrubby (12%), arbustive (11%), and arborescent (10%). The overall and seasonal distributions of biological types almost follow the diagrams: Therophytes (The)> Hemicryptophytes (Hem)> Phanerophytes(Pha) > Chamephytes (Cha)> Geophytes (Geo). During the two season: the winter and the spring, the annual herbaceous dominate the bio-morphological spectrum with perennial herbs. During the summer and autumn, perennial herbaceous plants dominate the bio-morphological spectrum. The families that are mostexisting overall and during the four seasons are Asteraceae, Poaceae, Lamiaceae and Fabaceae.

Bangladesh J. Plant Taxon. 30(2): 233-248, 2023 (December)

New Records of Seaweeds From The St. Martin’s Reef, Bangladesh. II.

2023-12-21T06:23:56+00:00

Peyssonnelia conchicola Piccone and Grunow, Gymnothamnion elegans (Schousboe) J. Ag. (reds) and Spatoglossum schroederi (Mertens) Kütz. (brown) seaweeds as new records are described and reported here in the second part of studies in the St. Martin’s Reef. This along with the eight seaweeds (with six new records) recorded and described in the first part earlier, the total taxa now are 11 (eleven). Again, all the eight samples were collected in a single day light period. Through extensive studies including sub-littoral zones of the two tiny Reefs having crystal clear water is expected to yield many seaweed species, including new ones.

Bangladesh J. Plant Taxon. 30(2): 249-254, 2023 (December)

New Record of Scenedesmus Vacuolatus From Soil In Vojvodina, Serbia

2023-12-21T06:33:50+00:00

Soil algae are photosynthetic microorganisms showing huge differences in morphology depending on the soil type, agricultural practices, and environmental factors. The aim of this research was to compare the results of classical and molecular protocols for microalgal identification. The green microalgae were isolated from acidic arable soil of dystric cambisol type, using BG11 medium and the agar plate method. Firstly, the identification of the microalgae was performed based on its morphological characteristics using light microscopy (LM) and taxonomic monographs and reference books. The isolate was initially annotated on genus level as Coelastrella sp. Gene marker (ITS2) was used for molecular identification. According to this protocol, the microalga was identified as Scenedesmus vacuolatus. Combination of morphology and DNA-based approach proved to be the most effective for obtaining a consistent species level identification. Moreover, this is the first record of Scenedesmus vacuolatus identification from soil in Vojvodina, Serbia.

Bangladesh J. Plant Taxon. 30(2): 255-261, 2023 (December)

Tree Diversity, Abundance And Dominance In The Lakeside Vegetation of Dhaka City, Bangladesh

2023-12-21T06:38:32+00:00

The present article deals with evaluating tree diversity, abundance, and dominance in the urban lakeside vegetation of Dhaka city. Data were collected using systematic sampling methods along with the transect lines. Visitor’s perceptions about existing tree diversity were also collected. A total of 2322 individuals under 118 tree species in 39 families were recorded from Dhanmondi, Hatirjheel and Gulshan lakeside vegetations. The origin analysis of tree species revealed that 39% areexotic and 61% are native. Among the tree species, the five most abundant areSwieteniamahagoni, Mangiferaindica, Cocos nucifera, Khayaanthothecaand Delonixregia. In these abundant tree species, three are exotic,such as Swieteniamahagoni, Khayaanthotheca, and Delonixregia, and the rest are native. According to the importance value index, the most five dominant tree species are Swieteniamahagoni, Samaneasaman, Cocos nucifera, Mangiferaindica, and Delonixregia. Likewise, among the top five dominant tree species, three are exotic, such as Swieteniamahagoni, Sananeasaman, andDelonixregia; the rest are native. The maximum number of tree species in the study areas are ornamental (25%), followed by medicinal (23%), fruit-bearing (22%), timber-producing (19%), and wildlife-supporting (11%). The maximum value of the Shannon diversity index was found in Dhanmondi (3.78), followed by Gulshan (3.41), and Hatirjheel (3.34). According to visitors’ perceptions, 85% of visitors favored positive actions regarding different management issues forlakeside tree diversity to enhance ecosystem services. A number of threats were identified for tree diversity in the study areas and suggested a number of recommendations for the management of tree diversity in three lakesides of vegetation (Dhanmondi, Hatirjheel, and Gulshan) to improve ecosystem services in the future.

Bangladesh J. Plant Taxon. 30(2): 263-275, 2023 (December)

Notes On Oedogonium Circinatum Tiff.(Oedogoniaceae) From Indian Sundarban

2023-12-21T06:52:16+00:00

Abstract not available.

Bangladesh J. Plant Taxon. 30(2): 277-281, 2023 (December)

Study Of Nitellahyalina (Charales) Based On Oospore Wall Ornamentation

2023-12-21T07:13:48+00:00

Abstract not available.

Bangladesh J. Plant Taxon. 30(2): 283-286, 2023 (December)