Ethnobotanical knowledge among the semi-pastoral Gujjar tribe in the high altitude (Adhwari’s) of Churah subdivision, district Chamba, Western Himalaya

The present investigation was undertaken in Churah subdivision of district Chamba of Himachal Pradesh which is located in the Western Himalaya. The district lies between 32° 11′ to 33° 13′ N latitude and 75° 49′ to 77° 3′ E longitude with an altitudinal range varying between 800 and 5200 m amsl. Vegetation growth is mainly found in the Ravi basin, which is semi-tropical to Himalayan temperate and sub-Alpine to Alpine types. The maximum Gujjar population in the district consists of Muslims. These are a semi-pastoral tribe, and they seasonally (early summers) migrate to the upper altitudes along with their cattle and return back to permanent settlements before the onset of winters. They celebrate festivals like Eid-ul-Fitr, Id-ul-Zuha, and Shab-I-qader. The social status of these tribal people is generally poor, and they live an isolated life only confined to their own community. The main occupation of the Gujjars is rearing buffaloes, and they sell milk and milk products in the market. In the past, not much in-depth studies pertaining to various ethnobotanical aspects on Gujjar tribal community have been conducted [22, 23].

Rigorous field surveys were conducted in 15 remote villages of Churah subdivision during June 2016 to September 2017 across all seasons to collect maximum information and authenticate the information provided by the local informants during the earlier visits. These villages were shortlisted on the basis of maximum Gujjar populations and thereby were selected for the surveys (Fig. 1). The interviews were conducted both at the permanent settlements and at the higher altitudes (Adhwari’s) for which trekking was done. A total of 135 informants within the age group of 11–90 years were interviewed (Fig. 2). The data helped us to analyse the trend of flow of ethnobotanical knowledge between different age classes. Traditional healers having sound knowledge of ethnomedicinal uses of plants were also interviewed in this study. The information was collected through structured questionnaires, interviews, and group discussions on various ethnobotanical aspects (Additional file 1). Trade-related information about the plants wherever available was also recorded.

Before the initiation of the interviewing process, the consent of the informants was also taken for participation in the study. The Gujjar informants did express some uneasiness in the beginning while sharing information, but gradually they responded quite well. A translator was hired to communicate and translate Gojri into Hindi. Details pertaining to the local name of the plant collected, plant parts used, ethnobotanical use of plants, and method of use were recorded. The informants were also asked to collect and show the plant specimens on site. The complete plant specimens, including its flower or fruit, were collected, dried, and assigned a voucher number (PLP) and then deposited as a record in the herbarium of the institute for future reference. The plant specimens were identified by using Flora of Himachal Pradesh [24]; Flora of Chamba [25]; Flowers of Himalaya [26].

A comprehensive data analysis was done using different quantitative indices viz. use value, fidelity, and informant consensus factor (F_ic).

The characteristics of the informants is given in Fig. 2. Maximum male and female informants who had extensive ethnobotanical knowledge belonged to the age group between 60 and 79 years. The informants below the age of 20 years also responded well depicting the obvious transfer of traditional knowledge among the younger generation (Fig. 2). The children accompany the elders to the higher altitudes and help them in collecting wild plants. They learn about the uses of various plants through observations and especially wild fruits. A similar trend has been shown in the previous studies [4, 35, 36]. The translator helped us in easy communications with the Gujjar informants and even helped in collecting plant specimens from the wild. The female Gujjar informants were more comfortable in providing information to the female researcher as they are quite reticent. The tribal people of the region have a close relationship with nature and the vast experience of resource utilisation [37].

The study area is floristically rich, and the local inhabitants use a large number of plant species for variable uses. A total of 83 plant species belonging to 75 genera and 49 families were recorded in the study area (Table 1). The majority of plants belonged to Rosaceae (12 species), Polygonaceae (7 species), Betulaceae (4 species), Amaranthaceae (3 species), Apiaceae (3 species), Berberidaceae (3 species), Lamiaceae (3 species), and Ranunculaceae (3 species) [38‐40] (Fig. 3). The genera represented by the highest number of species are Fragaria (3 species), Prunus (3 species), Rubus (2 species), Persicaria (2 species), Rhododendron (2 species), and Berberis (2 species).

The most frequently used plant parts are leaves, fruits, roots, seeds, and whole part (Fig. 4). This result is similar to other investigations [41‐48]. Easy availability of leaves with its higher metabolite content can be the reason for its preference [49, 50].

Maximum plant species (32) were reported for ethnomedicinal uses followed by food (22 species), household uses (16 species), fruits (15 species), and fodder (14 species). Use value is an important tool for selecting the most valued plants of any region for its detailed pharmacological investigation [51]. Highest use value was reported for the plant species which had multiple uses in the area. On the basis of use value (UV), the most important plants in the study area were Pteridium aquilinum (1.72), Juglans regia (1.60), Corylus jacquemontii (1.44), Urtica dioica (1.4), Diplazium maximum (1.21), Angelica glauca (1.16), Rumex hastatus (1.09), and Rheum australe (1.04) (Table 1). More than one plant part is used for about 13% of the species. For example, the bark of Juglans regia is used in cleaning teeth, its fruit is edible, and the wood is used in various household purposes. Similarly, the fruits of Phytolacca acinosa are fed to poultry while its aerial parts are eaten as a vegetable. The fruits of Solanum nigrum are edible while the tender leaves are eaten to cure dysentery. The leaves of Betula utilis are used to cure the urinary infection, and the bark is used in thatching roofs as a waterproof medium.

The highest informant consensus values were obtained for food and fruit plants (F_ic = 0.99), followed by fodder plants and household uses (F_ic = 0.98) while it was least for the plants used for ethnomedicine (F_ic = 0.97) (Table 2). Ethnobotanical uses of wild plants reported during the present investigation were found in agreement to previous studies [52, 53]. This reveals that wild plants play an important role in the sustenance of the people of the region. The various forest products not only fulfil their essential household requirements but wild vegetables and fruits provide essential vitamins and minerals for a healthy life [54]. A higher number of plants used for ethnomedicine by the tribal people indicate their dependency on locally available plant resources for curing various human and cattle related ailments. The complex ailments are healed by the local healers. This also signifies the unavailability of appropriate health care facilities in these remote regions. Aconitum heterophyllum, Bergenia stracheyi, and Verbascum thapsus with similar ethnomedicinal uses have been mentioned in the previous studies [55]. Roots were mostly used for curing various ailments because of easy availability in the dried form throughout the year [56].

The fidelity level varied from 8 to 100% in all the use categories (Table 3). Phytolacca acinosa (100%), Stellaria media (100%), and Urtica dioica (100%) were some of the species with high fidelity level used as food plants. The important species of wild fruits in the study area include Berberis lycium (100%), Prunus armeniaca (100%), and Rubus ellipticus (100%). Some of the important fodder plants with high fidelity values (100%) were Acer caesium, Aesculus indica, Ailanthus altissima, and Quercus semecarpifolia. Only a few plants with 100% fidelity were observed for ethnomedicine which were Aconitum heterophyllum, Angelica glauca, and Ajuga integrifolia while maximum plants in this category showed lower percentages of fidelity values varying from 10.91 to 47.12%. For the household use, least fidelity percentage was observed for Carpinus viminea (8%) while Angelica glauca and Boenninghausenia albiflora showed 100% fidelity values (Table 3). The fidelity level (Fl) helps in identifying the most preferred species for a particular use category. The high value of fidelity level (100%) indicates the same method of use for a specific plant [57]. Seventy-one plant species had 100% fidelity level. The ethnomedicinal plant use category had the maximum of 22 species with 100% fidelity level followed by food plant category with 18 species with 100% fidelity level.

With the onset of summer, the Gujjars start migrating to the higher altitudes with their cattle and stay in the temporary settlements called ‘Adhwari’s’. During this period, they uproot commercially important medicinal plants from the wild which they sell to local traders for financial gains [58]. The common medicinal plants harvested by them include Aconitum heterophyllum, Dactylorhiza hatagirea, Morchella esculenta, and Picrorhiza kurrooa (Table 4). Such indiscriminate exploitation of plant materials from nature can stress the natural population of these medicinal plants [59, 60]. Many of the plant species are categorised as threatened in the state that includes Aconitum heterophyllum, Angelica glauca, Berberis aristata, Betula utilis, Dactylorhiza hatagirea, Jurinea macrocephala, Sinopodophyllum hexandrum, and Taxus wallichiana (Table 5). Though these plant resources play an important role in the subsistence of the people, it may not be sustainable in the near future [61].

The extensive literature review revealed the lesser known or new uses for 21 plant species from the study area (Table 5). Out of these, 13 plant species had ethnomedicinal uses, six household uses, and three edible uses. In the present study, leaf juice of Pleurospermum brunonis was used to cure skin infections while it was reported to cure jaundice and fever and used as an insect repellent in the previous studies [62, 63]. The root of Asparagus adscendens was used to control hair fall while previously it has been reported as carminative and demulcent [64]. The decoction of leaves of Betula utilis was used to treat a urinary infection while the dried root powder of Trillium govanianum was used to cure arthritis. Morchella esculenta besides eaten as a vegetable was also used to cure a cold and cough while in the previous reports it is known to protect the stomach, nourish the lungs, and strengthen immunity [65‐67]. The root of Oxalis corniculata was used to treat dyspepsia, and aerial part of Polygonum aviculare was used to cure pneumonia. Seed powder of Prunus cornuta was administrated orally to cure diabetes while the same species was reported against anaemia [23]. The tender leaves of Solanum nigrum were reported to treat dysentery while it is known to cure a headache [55]. The animal ailments like a cough and a cold of buffalos were cured using leaves of Rhododendron campanulatum and Daphne papyracea. The worm-infected sores and wounds of cattle were healed using leaves of Caltha palustris while it has been reported to cure various other ailments like urinary infections and inflammation in the previous studies [68, 69]. A number of plants were used by people for household uses like leaves and roots of Primula floribunda for cleaning milk containers to remove the oiliness and odour of the utensils while it has been reported for its use to ward off devils and as a hair decorator by women [70, 71]. Very interesting information was provided by the Gujjars about the use of root of Persicaria amplexicaulis in tea making which they consume very often because of easy availability of the plant, good flavour, and a number of health benefits. Fruits of Brucea javanica were used in making chutney (sauce) while the cracked seeds of Clinopodium vulgare were used in various recipes. They make brooms from the stems of Sarcococca saligna and shoes from the bark of Carpinus viminea. The poor economic conditions of the Gujjars and remoteness of the area have made them adopt indigenous knowledge passed through their ancestry.