Additional data of the geographical distribution of 61 flowering plant
s in northern Switzerland are given. Two of the observed species, Brom
us willdenowii and Pennisetum flaccidum are reported to our knowledge
from Switzerland for the first time and probably have been introduced
recently. Twelve species belong to the vulnerable plants of Switzerlan
d; three species, Vaccaria hispanica, Sisyrinchium bermudiana, and Ele
ocharis ovata are endangered.