the plant they use occupy, administration and contraindication. Plants were purchased for identification. As a result of this work, 29 families, 55 genera and 56 species of plants that are commercialized in the two markets are recognized. Fifty-two people were interviewed, of whom 39 have a relationship with otomies and 13 who do not; 17 of them were men and 35 women, with ages ranging from 15 to over 60 years. The informants between 41 and 60 years have more knowledge. The plants sold in the markets cure 14 different types of diseases, including those of the digestive apparatus with 61, considering that more than one use is mentioned in the same plant, followed by those used for cultural syndromes with 35 references, those of the respiratory system with 26 citations and the urinary system with 20. The most commonly used parts are the leaves, flowers and the whole plant. The most used preparations are cooking followed by plant combination and the infusion. When obtaining the use value of each plant, the highest percentages were the epazote (Dysphania ambrosoides 23.4%), lemon (Citrus aurantiifolia 21.8%) and tila (Ternstroemia sylvatica 20.3%). Twenty-one of the plants mentioned in this work have not been cited as medicinal in previous research in the state of Hidalgo.