Abstract:Acclimation to growth light regimes and the strategies of photoprotection were explored in two exotic herbaceous species, Eupatorium adenophorum Spreng. and Amomum villosum Lour. E. adenophorum, a notorious invasive species, spreaded into China in 1940s, and now distributes in all provinces of southwest China. It is sun species, but can grow and develop normally in shade environment. A. villosum, being introduced to Xishuangbanna intentionally from Yangchun county, Guangdong province, is a perennial herb an...