Investigating botanic resource in Dinh Hoa district, Thai Nguyen province, the authors obtained some results as follow: The constitution of botanic species at the study site is quite copious, comprising 636 species of 401 offshoots, 126 families, 5 high grade vessel botanic branches. Among them, the branch of Magnoliophyta has the greatest numbers offamilies, offshoots and species: 107 families (84,9 percent the families of the system), 372 offshoots (92,8 percent the offshoots of the system), and 592 species (93,1 percent the species of the system)
the botanic families which have more than 6 species are identified. Among them, the families having the most species are Poaceae (having 56 species, rating 8,8 percent", Euphorbiaceae (having 46 species, rating 7,2 percent), Fabaceae (having 36 species, rating 5,7 percent), Moraceae (having 23 species, rating 3,6 percent), Rubiaceae (having 20 species, rating 3,1 percent). Of these families, the offshoots that have the most species are Ficus (15 species, 3,7 percent), Clerodendron (7 species, 1,7 percent), Litsea, Bambusa, Garcinia, Croton and Smilax each have 5 species (1,2 percent).