Abstract:

【Objective】To understand the current situation and distribution characteristics of the wild poisonous vascular plant resources in Chifeng City，Inner Mongolia in order to provide references for the prevention of livestock poisoning as well as the development and utilization of the wild poisonous vascular plant resources in Chifeng City.【Methods】 Field sampling，site visiting，and literature viewing were used to statistically analyze the number of species，water ecotype，life form，habitat type，toxic parts，toxicity，and toxic components of wild poisonous vascular plants in Chifeng City.【Results】In Chifeng City，there were 249 different species of wild poisonous vascular plants that belonged to 64 families and 150 genera，accounting for 95.52%，80.21%，and 70.94% of all the families，genera，and species of poisonous vascular plants in Inner Mongolia. Mesophytes，which made up 200 species belonged to 60 families and 132 genera and accounted for 80.32% of all species，predominated the water ecotype. The majority of the life form consisted of herbaceous plants，which made up 211 species belonged to 47 families and 127 genera，accounted for 84.74% of all species. The habitat types were mainly grassland and meadow，with 130 and 116 species，respectively. In Chifeng City，with 176 species in total，vascular plants that were poisonous across the entire plant were most prevalent. There were 180 species of vascular plants that were moderately toxic，66 species that were slightly toxic，2 species that were highly toxic，and 1 species that were strong vascular toxic plant. The majority of toxic vascular plants containing glycosides and alkaloids as toxic components，with 86 species and 72 species，respectively.【Conclusion】The wild poisonous vascular plant resources were abundant in Chifeng City. Most of the toxic components were glycosides and alkaloids. Stellera chamaejasme was most widely distributed. The comprehensive research and utilization of poisonous vascular plants should be strengthened.

Key words: Poisonous vascular plants, Mesophyte, Herbaceous plant, Toxicity, Toxic parts, Toxic components