BIOLOGICAL AND ECOLOGICAL CHARACTERISTICS OF PLANTAGO VIRGINICA L.
北美车前生物与生态学特征的研究

Plantago virginica L.,a weed originating from North America,was introduced into China about 1980's.Its characteristics research of biology and ecology in this paper shows:1.P.virginica L.has been widely distributed in east China; 2. its population is a transient one in Jinhua area,Zhejiang province;3.it has two types of flowers:anemophilous flower and cleistogamo us flower,and the later is the main one. climate condition,Plantago virginica L.population density and man-made interference have influences on the percentage of anemophilous flower;4.high ligh compensation point and lower photosynthetic rate are its photosynthetic characteristics.