8[2]Britton Nathaniel Lord,Brown Hon Addison,Brown A,et al.An Illustrated Flora of the Northern United States,Canada and the British Possessions[M].New York:Charles scribnerason,1913:166.
9[3]Parker Kittie F.An Illustrated Guide to ARIZONA WEEDS[M].Arizona,USA:The University of Arizona Press,1990.
10[4]Bah M,Gutierrez D M,Escobedo C,et al.Methylprotodioscin from the Mexican medical plant Solanum rostratum (Solanaceae)[J].Biochemistry System Ecology,2004,32 (2):197.