The survey and collect of some cereals, legumes and earth crops consumed by 5 minorities: Yunanese, Akha, Lahu, Yao, and Lisu  locating at Doi Mae Salong Chiang Rai province were conducted.  The study aims at gethering material to varieties and studied on their morphological characters.  Information are obtained by interview and collect sample through each minorities via interpreters.  Collected specimens were photographed for identification correctly to the species and varieties, these by available references, comparison of specimens through major herbaria, and rechecked by specialists. The specimens were deposited at the Ethnobotanical Research section, Faculty of Science, Chiang Mai University and at Herbarium, Queen Sirikit Botanic Garden.

            The result indicated 5 major groups of cereals were consumed by the minorities; there are 39 varieties of rice, 13 varieties of corn, 2 varieties of sorghum and 1 variety of coix.   Twelve species of legumes were collected i.e; groundnut, pigeon pea, sword bean, soybean, lablab, common bean, pea, winged bean, rice bean, yard-long bean, and cowpea.  Moreover 12 species of earth crops were also collected; i.e; taro, xanthosoma, edible canna, sweet potato, dioscorea, cassava, arrowroot, yam bean and 2 species of sweet yam.

            Many species of these plants able to develop to be major food and economic plants, which elephant yam (Amorphophallus paeoniifolius Nicolson. and Arisaema sp.) and some species have high potential to be the materials for industry scale such as sweet sorghum (Sorghum bicolor cv. group bicolor) for comercial sugar and starch such as edible canna (Canna edulis  Ker-Gaw.) of which their starch is good for making celophane noodles.  Wild varieties of these plants are urgently needed to be conserved before the valuable indigenous knowledge disappear due to the present environmental situation and the advancement of technology factors.