Herbs are the most important products in natural resources which directly have a positive impact on the lives of people. Many of the drugs we use are directly or indirectly from herbal medicinal products. The importance of plants has been evident to humans since ancient times as Egyptians have been expertise from the sixteenth century BC in the extreme use of these plants [1-3].

As expressed before, Egypt, has a long history in terms of research background in this area. From ancient times, Jewish people used these plants too. India also has a very famous old books on herbs called caraca and Susruta. China's oldest medical book is attributed to one of its emperors called Shinon who lived in 2800 BC from 8 to 10th centuries, famous Iranian scientist Avicenna and Razi were shining in this field [4-7]. In Western countries, progress in this science dates back to the early Middle Ages that continues to date and by scientists such as Constantine, Epitome Matthiol, and Dragendroff and so on has been done [8-10]. In Iran, the most comprehensive investigation in this case was conducted by Ali Zargari and the result has been published in five volumes [5]. In Iran, with respect to special geographic locations and different climatic conditions is habitat of many varieties of medicinal plants and In the meantime, the province of Fars province is the most relevant So that, according to the provincial Department of Natural Resources, there are more than 1600 species of medicinal plants in Fars and more than 100 species of them are massively cultivated on 600 hectares of land in the province, of course, the data is not on tree species and the garden. Medicinal plants export from province abroad in 2015 was 48 tons So that the province has become the first exporter of these products in the country. It should be noted that the province with an area of 133000 square kilometers includes 8.1% area of the country which is located in the southern part of the country and holds Three climate in which The North and North West of the province has mountains with snow and rain and the amount of rainfall is over 400 millimeters a year. Central areas with mild winter and hot and dry summer is with annual precipitation of 200 to 400 millimeters. Also, south and South-East holds mild winter and very hot summer with annual precipitation of 100 to 200 millimeters [7]. figure shows the situation of Fars province in Iran (Figure 1).

Figure 1: Situation of Fars province in Iran.

Research Methodology

In this study, following steps were taken to conduct the research.

Gather information and data: Given that there are a lot of resources of medicinal plants, but most of them are a reflection of people's experiences although not certain, but most of them have no formal training in this area and have just inherited and acquired these practices that certainly will be helpful to use the information provided that the information be evaluated with scientific data that has been considered in this study. In addition, the relevant articles and books have also been used. Research is also being conducted by the departments of natural resources, agriculture, the environment and the tribes of Fars province is also considered.

Information and data evaluation: in this regard for other articles, books and academic research there is no problem, but as mentioned before, information about people who have been working on an experimental basis in the field of medicinal plants should be evaluated and just the sort of information that is scientifically acceptable and consistent with their academic issues were used.

Extracting the desired and key data: Due to the large volume of literature on medicinal plants, at this stage, it was launched to extract key data which were useful for getting familiar with province medicinal plants and again to simplify using them, they have been tabulated.

Climatic variations in Fars province has caused a wide range of plants from different families to grow and this factor has had the most for the province to turn to the largest medicinal plants of the country

The Most families of medicinal plants in Fars province include Leguminoseae- Rosaceae- Cruciferae and Umbelliferae.

Many medicinal plants in Fars Province like Crocus sativus-Oryza sativa-Cerasus arium, Citrus limonum are found only in certain parts and their distribution is limited.

Some of medicinal plants Peganum harmala-Punica granatum- Triticum sp . have been widely distributed and are observed in other places too.

Development of production and utilization of medicinal plants is one of the most important ways of creating jobs for local people and it would only be possible with the cooperation of government efficient machination.

Due to the current situation in the province, already the possibility of expanding production of medicinal plants and products is more than before.

In this part, all results have been tabulated according to plants branches and their deviations and also key and detail information of each species have presented subsequently in the Tables 1-5.

Table 1: Fars Province important medicinal plants. Spermatophytes Division-Angiosperms. (Subdivision-Dicotyledons Class-Dialypetalaes Subdivision).

Table 2: Important medicinal plants in Fars province(Spermatophytes Division-Angiosperms Subdivision-Dicotyledons Class-Sympetalaes Subdivision).

Table 3: Important medicinal plants in Fars province (Spermatophytes Division-Angiosperms Subdivision-Dicotyledons Class-Monochlamideaes Subdivision).

Table 4: important medicinal plant in Fars province(Spermatophytes Division-Angiosperms Subdivision-Monocotyledons Class).

Table 5: Important medicinal plants in Fars province(Spermatophytes Division-Gymnosperms Subdivision).