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Twenty-five tree species indigenous to Guangdong Province were chosen in this study to portray their distribution patterns in relation to environmental factors. Both data of species distribution and environmental factors were tabulated based on a digitized map of Guangdong Province gridded at 0.5° latitude ×0.5° longitude. Grid-based diversity was mapped using DMAP, a distribution mapping program,...
Four species of the Comastoma genus (Geianaceae) in Helan Mountains between Inner Mongolia and Ningxia Province in China have been recognized by morphological and geographical taxonomy. These four species are C. falcatum (Turcz.) Toyokuni, C. polycladum (Diels et Gilg) T. N. Ho, C. tenellum (Rottb.) Toyokuni and C. acutum (Michx.) Y. Z. Zhao et X. Zhang. Among them, C. tenellum (Rottb.) is a new recorded...
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