抄録
Tama City is a city within Tokyo having the area of 21.1 km2 and the population of 140,000. The city lies on hilly lands along the middle reaches of the Tama River. The city has rapidly expanded since 1965 through urban development in the hilly area and become to a new suburban city of Tokyo.
Imported into Japan by human activities and established naturalized plants, have greatly increased in species numbers during the course of the city's developments. In this paper, 267 species belonging to 54 families are reported based on our field work. The ratio of the naturalized species to total plant species in the city is estimated to be 25.7%. The ratio of the escapes to total naturalized species is estimated to be 41.9 %.
https://ror.org/04r8tsy16 
