Analysis on population surviving process of Changium smyrnioides, an endangered plant
濒危植物明党参种群生存过程研究

Changium smyrnioides Wolff, a monotypic species of Umbellaceae, occurs only in a narrow zone in the eastern to middle part of the Yangtze River Basin, south part of China. As a result of human activity and its biological characteristics, C. smyrnioides has already become an endangered species. It is important to understand the basic life history and growth process as well as endangered mechanism. Because of the difficulty in estimating the age of C. smyrnioides individuals, a Logistic Growth Model was used ...