Identification of plants in an area is an infrastructure for other studies such as ecological researches, ecosystem management and plant conservation. Yasooj region with an area about 1591593 hectares include some sections of Fars, Kohgiluye and Boyrahmad and Esfahan provinces. This research was carried out with the purpose of flora identification and investigation of life form and chorotype in this region. For this, plant samples were collected and identified using field surveys. The results of this research led to identify 929 plant species belonging to 417 genera and 84 families, indicating habitat diversity and high potential of biodiversity in Yasooj region. This study showd the most abundant families were Asteraceae, Fabaceae and Lamiaceae with 135, 111 and 70 plant species respectively. The most abundant genera were Asragalus, Centaurea and Nepeta with 53, 15 and 13 plant species respectively. According to the life form studies, hemichryptophytes and therophytes with 44.84% and 28.06% respectively include more than 70% of identified plant species. Chorotype of the most species belonged to Irano-Turanian (68.49%) in Yasooj region.

The extent of area is about 1000 hectars. This is a part of Binalood in north-western of Mashhad .The average maximum temperature is 34.6°c in July and minimum temprature is 34.6°c in January .A floristic study was done for the area plants and then biological forms and plants chorotype were identified .In this research 45 family, 195 genera and 266 species were identified. The largest plant family is Asteraceae with 34 genera and 51 species and largest genera is astragalus of papilionaceae with 6 species. Chief biological forms are: Therophytes ,Hemi cryptophytes and Cryptophytes. The most of plants chorotype with 52.3% is related to Irano -Turanian

In this research, the lake of Sepidroud dam was situated which is located near Manjil in 300-400 m above sea level. Average annual precipitation reached to 213.7 mm. The dominant vegetation of this area was Amygdalus-Artemisia community. A total of 239 species were identified based on plant samples collected in 2011. They included one fern, two gymnosperms, 210 dicotyledones and 26 monocotyledones. Altogether, 57 families and 194 genera were known from the area. The following families had the highest number of species: Asteraceae (18%), Poaceae (7.5%), Brassicaceae (6.7%), Lamiaceae (6.3%), Fabaceae (5.4%), Chenopodiaceae (5.4%) and Caryophyllaceae (5%). Therophytes with 48.5% and hemicryptophytes with 25.5% were the most frequent life forms of the area. The distributions of 47.7% of species were restricted to Irano-Turanian region. Gravelly-lime lands had the most species richness between different habitats.178 species were growing in the habitat.

The Sadetarik Forest Park with an area about 614.85 ha is located at south-east of Rasht city. The aim of this research was to study the floristic composition, life forms and chorotype in Sadetarik Forest Park. Floristic composition in the region, and plant species were identified at the levels of species and genus by fieldwork. Floristic study indicated that there are 90 plant species belonging to 81 genera and 46 families. The important families were Asteraceae, Rosaceae and Apiaceae with 11.1%, 8.9% and 6.7%, respectively. According to Raunkiaer’s classification, the life forms were hemicryptophyte and phanerophyte with 36.6% and 30%, respectively. Chorotype of the most species belonged to Euro-Siberian (32 species, 35.6 %) on the basis of Zohary’s criterion.

The Booz Daghi region, encompassing an area of 62, 000 hectares, is situated 47 kilometers from Maneh and Semelghan city. This study explored the floristic composition, biological, and chorological spectra of the area through numerous random collections in various habitats and vegetation types, and from 220 plots established in selected plant communities during the growing season of 2021. A total of 252 vascular plant species, belonging to 173 genera and 53 families, were recorded as native to the Booz Daghi region. The most diverse families were Asteraceae (31 species), Poaceae (25 species), Lamiaceae (22 species), and Fabaceae (21 species). The genera Astragalus L. (10 species), Allium L., Convolvulus L., and Stachys L. (each with 5 species) were among the richest. Hemicryptophytes (31. 3%) and therophytes (29. 8%) emerged as the dominant life forms in the region. A significant number of species (63. 5%) were identified as belonging to the Irano-Turanian region. The findings of this study indicate that the Booz Daghi region possesses a relatively rich flora, necessitating special attention and proper planning for the conservation of its biodiversity.

Floristic studies of any regions have high importance, because the florists list is an exploration document to identify the existing species and consequently the potential of the area. The aim of the study was introducing the flora of the transitional zone of Irano-Turanian and Sahara-Sindian phytochoria in Sistan and Baluchestan Province. For a floristic study of the area plant specimens were collected and identified. Field data collections were conducted during the year 2013. The life forms as well as geographical distributions of the species were determined. Flora in this region include 51 families, 233 genera and 327 species. The larger families are Compositae (42 species), Poaceae (39 species), Brassicaceae (28 species), Papilionaceae (27 species) and Chenopodiaceae (25 species) respectivly. The biggest genus was Astragalus with 7 species. Biological types of this area included Therophytes (37. 92%) where the dominant life-form followed by hemicryptophytes (22. 94%). phanerophytes (18. 96%), Chamaephytes (14. 37%) and Geophytes (5. 81%). Chrological analysis showed 24. 77% of the studied plant species belonged to Irano-Turanian / Sahara-Sindian region and 24. 16% Sahara-Sindian, 22. 33% Irano-Turanian, 3. 36% cosmopolitan elements and others are ploriregional. According to the results of this study, it can be concluded that the research area is located in Ecoton region.

The present study was conducted for the first time with the aim of identifying the flora, determining the biological forms and geographical distribution of plant species in the pasture section of Tutkabon-Damash watershed. In order to study floristics, the plant species were collected around during 1399-1400 and identified by the available plant identification guides.159 plant species belonging to 104 genera and 36 families were identified. In terms of the number of species, Poaceae with 30 species, Asteraceae with 16 species, Fabaceae with 15 species and Brassicaceae with 9 species were the richest. Classification of plants based on life form showed that the most life form is related to hemicryptophytes with 83 species (52.83%), followed by geophytes and therophytes each with 30 species (20.75%). From the chorological point of view, we determined that the largest proportion of the flora belongs to the Pluriregional elements (20.75%), followed by Europe-Siberian (18.86%), Europe-Siberian, Iranian-Turanian, Mediterranean (14.46%), Iranian-Turanian and Europe-Siberian , Iranian-Turanian (11.94%), cosmopolitan (9.43%), European-Siberian, Mediterranean (8.17%), Iranian-Turanian, Mediterranean (4.4%). The protection status of the plant species showed the presence of two rare and endangered species Lilium ledebori, Fritillaria kotschyana also d the vulnerable species Convolvulus cantabrica. The rich biodiversity and the presence of species with high genetic value reveal the need to protect and manage this natural habitat.

Munjughlu sanctuary zone with 5270 hectares in East Azarbaijan province is one of three sanctuary zones in the Marakan protected area. During 2008–2009, 236 taxa (166 genera, 23 subspecies, 22 varieties and one form) belonging to 38 families were collected and determined for this zone. Among them, 208 taxa are dicots and 28 are monocots. Family Compositae with 46 species and Cruciferae with 23 species are the largest families followed by Amaranthaceae with 21 species and Poaceae with 16 species. The most diverse genera are Astragalus (nine species) and Centaurea (five species). This area contains 14 endemic taxa, seven rare taxa and five monotypic genera. For the first time, 21 taxa from Northwest Iran and 14 taxa from East Azarbaijan and a single taxon from East and West Azarbaijan are reported here. Dominant life forms include therophytes (40%), followed by hemicryptophytes (39.1%). The chorological study shows that bi- tri- or plural elements with 59.51% of the chorotypes are dominant, followed by Irano-turanian elements with 39/43%.

This study aimed to evaluate floristic list, life forms and chorology of plant species of Shalam protected area, which is in western Iran. This region characterized by various physiographic conditions and oak (Quercus brantii L. ) as the dominant tree species. Plant species were collected by field survey in May and June 2016. The species were identified and their chorology, growth form and life form were determined using taxonomy resources. The results showed that flora of this region includes 129 plant species, belonging to 34 families and 101 genera. The Poaceae (20 species), Papilionaceae (18 species), Asteraceae (15 species) and Lamiaceae (12 species) were the most frequently encountered families. The number of species was more in the south than in the north-facing slope in different elevation classes. According to Raunkiaer’ s classification of life forms, therophytes and hemicryptophytes were the dominant life forms in the study area. In addition, annunal and perennial forbs dominated the growth forms of both facing aspects. In geographical distribution point of view, Irano-turanian and Irano-turanian-Mediterranean in all physiographic conditions had the highest geographical distribution.