Berberis aquifolium Pursh - New Species for the Flora of Nakhchivan Autonomous Republic of Azerbaijan

The current state of the tree family Rosaceae is considered. As a result of the research, the taxonomic composition, life forms, ecological groups, geographical areas and classes of tree species of the Rosaceae family, widespread in the mountain-xerophytic and steppe vegetation of the flora of the Ordubad district, were revealed. When characterizing the Rosaceae tree species of the mountain-xerophytic and steppe zone of the flora of the Ordubad region, it was established: Rosa— 14 (29.1%), Prunus — 6 (12.5%), Crataegus — 5 (10.4%), Pyrus — 5 (10.4%), Sorbus — 5 (10.4%), Cotoneaster — 5 (10.4%), Rubus— 3 (6.25%), Spiraea — 2 (4.16%) and 1 (2.08%) each of Malus, Louiseaniaand Pyracantha. The structure of the flora of the Ordubad region is dominated by species belonging to the genus RosaL. They are part of the shrub steppes and form independent groups and unique communities.

Flora Current State of Rosaceae Woody Species in Mountain Xerophytic and Steppe Vegetation of Ordubad District

Babayeva

2024

Mountain-Xerophytic Vegetation Type Found in Daridag

Heydarova

2024

Information about the mountain-xerophytic type of vegetation of the Daridag area is presented. Areas at an altitude of 1200-1600 m above sea level are characterized by plant species with mountain xerophytic vegetation. Mountain xerophytic flora is not homogeneous and represents a set of individual phytocenosis. Ephemeral plants play an important role in this vegetation. In addition to ephemerals, the vegetation includes bulbous, tuberous, and various grasses, mainly: Rhamnus pallasii Fisch. & C. A. Mey., Astragalus microcephalus Willd., Astragalus beckerianus Trautv., Astragalus aduncus Willd., Thymus kotschyanus Boiss. & Hohen., T. collinus M. Bieb.,Euphorbia seguieriana Neck., Caragana grandiflora (M. Bieb.) DC., Atraphaxis spinosa L., Acanthophyllum mucronatum C. A. Mey., Zygophyllum atriplicoides Fisch. & C. A. Mey., Z. fabago L., Acantholimon araxanum Bunge etc. In total, the study identified 6 groups of formations and 16 associations. These include thorn shrubs, monodominant tragacanth xerophytic shrubs, cushion xerophytic shrubs, subshrub phrygana and mixed shrubs, which are included in the mountain xerophytic vegetation type. The phytocenosis of mixed herbaceous shrubs is comprised of 35 species, of which 10 species are shrubs (28.56%), 1 species is a semi-shrub (2.86%), 1 species is a shrub (2.86%), 2 species are semi-shrubs (5.72%), and 21 species are perennial and biennial (60%) plants. With regard to their life forms, of the 21 species included in the monodominant tragacanth xerophytic shrub grouping, three species are shrub-like, two species are shrubs, two species are semi-shrubs, and 14 species are perennial grasses.

Study of Ontogenetic Structure and Density of the Coenopopulation of Hedysarum atropatanum Bunge ex Boiss. Flora of Daridag

Heydarova

2024

The article presents findings from a study of the demographic structure and density of the population of the species Hedysarum atropatanum Bunge ex Boiss., which is widely distributed in the Daridag area. A total of ten ontogenetic states (seed, seedling, juvenile, immature, virginile, young generative, middle aged generative, aged generative, subsenile and senile) of the H. atropatanum species were observed. The processes of ontogenesis, which can be classified as normal, fast, or slow, were identified as the primary mechanisms driving species evolution. Additionally, instances of developmental disruptions, rejuvenation, and the manifestations of aging were observed. The majority of individuals belonging to the species H. atropatanum exhibit a normal to rapid growth rate. It has been observed that the process of ontogenesis is slower in areas with high plant density. It was determined that the secondary quiescence period does not manifest during the initial stages of development; rather, it becomes feasible only after the individuals have reached the virginal state. It has not been observed that immature individuals bypass the virginal state and immediately transition to mature generative plants. The vitality status of the individuals was determined based on a comprehensive analysis of multiple morphological traits, including the height of the specimens, the number of shoots, the number of flower carriers, the length of the leaves, the size of the leaves, and the number of flowers in the flower group. Following the statistical processing of the data, three classes of vitality were identified. A study revealed that individuals of the second vitality level of the H. atropatanumspecies are more prevalent in the coenopopulation. The optimal habitats of the H. atropatanum s