| The field investigation of Gansu corridor showed that the corridor had 181species, 81genera, and 23 families. Of them, 109 species, 63 genera and 20 families were dicotylodens, 22 species, 18 genera and 3 families were monocotyledons; 18 kinds of plants were medical plants, 18 kinds of plants were fodder plants, 7 kinds of plants were ornamental plants, 6 kinds of plants were fiber plants, 3 kinds of plants were tannin plants, and 2 kinds of plants were alkali-making plants. |