Reproductive traits associated with invasiveness in Coreopsis lanceolata Clonal Reproductive Property and Community Characteristic of Invasive Species Coreopsis lanceolata Effect of Clonal Growth on Mating System of Invasive Plant Coreopsis lanceolata Chemical constituents from Coreopsis lanceolata Study on growth and photosynthesis traits of the invasive species Coreopsis lanceolata and its co occuring species in contrasting light conditions