An Analysis on Flora of the Evergreen Broadleaf Forest in Liuxihe River, Guangzhou

The evergreen broadleaved forest was one of the typical vegetations in subtropical area.In the upper reaches of Liuxihe river watershed, Guangzhou, this kind of forest was mainly found in areas below 200 m above sea level.So, its flora was not so rich relatively.According to the areal-types of families and genus of the carpophytes, the tropical-subtropical components were the most abundant, with a few temperate components.Together with its flora, the flora of evergreen broadleaf forest was originated on the Cathaysian ancient land during the early Mesozic.And, the deciduous components in this kind of vegetation came neither from the Pan-Arctic nor from the tropical, because the defoliation was not induced by the low temperature but the drought climate-the Cretaceous drought climate.