Ethnobotanical study of indigenous knowledge on medicinal plants used to treat diseases in selected districts of Amhara Regional State, Ethiopia

摘要

This study was conducted in four districts of Amhara Region, Ethiopia. The aim of the study was to assess medicinal plants found in Menz gera, Siyadebirna Wayu, Antsokiya gemza and Bugna districts, Amhara region, Ethiopia. The ethnobotanical surveys were carried out from September 2017 to June 2018 using a semi-structured checklist consisting of questions or issues prepared in advance. Two separate questionnaires were prepared, one for the local healers and the other for the local community. A total of 376 (94 per district) informants were selected using purposive sampling technique and asked both open and close-ended questions. The interviews and observations were based on and around this checklist and some issues were raised promptly depending on responses of an informant. All plant species found in each district were recorded, collected, pressed and identified following Flora of Ethiopia and Eritrea. From the total 376 informants 238 were males and the rest 138 were females. A total of 77 medicinal plants were reported and distributed in 28 families. Family Lamiaceae was distributed in all four districts followed by 5 families which were distributed in three districts. Leaf 47 (56.63%) was the plant part widely used followed by stem 12 (14.46%), root 8 (9.64%) and seed 7 (8.43%), while the rest include fruit 3 (3.61%), bulb 3 (3.61%), flower 1 (1.20%). Ocimum lamiifolium Hochst. and Citrus durantifolia were the plants with the highest fidelity level values, each scoring 100%, followed by Moringa stenopetala (Bak.f.) Cuf. (96%). From the present study, the highest number of medicinal plants was observed in Antsokiya Gemza District followed by Siyaderina wayu, Bugna and Menz Gera, with 29, 24, 15 and 9 number, respectively. In these four districts the highest number of plants was used to treat wound followed by abdominal disease/pain. Pounding and grinding of the plant parts to make a powder were the most frequently used methods of traditional medicine preparation. Traditional medicine is the base for the modern medicine, but nowadays, the work is not respected by most people so it needs further attention especially in changing the attitude of the community towards traditional medicine.