The Characteristic of Community with Brainea insignis in Yinpingzui Natrue Reserve, Dongguan

Brainea insignis is one of the fern species belonging to the second class national key protected plants.According to the investigations in 16 sample plots totaling(1 600 m~2) in Yinpingzui Nature Reserve of Dongguan City,the communities consist of 99 species,88 genera,60 families of vascular plants.Analysis of floristic geographical elements showed that the percentage of tropical elements is high,accounting for 83.95% of the total numbers of genera.The community can be structurally divided into arborous layer,shrub layer and herbaceous layer.In the arborous layer Itea chinensis,with an importance value of 35.05%,is the biggest,and in the shrub layer the biggest one is Brainea insignis with an IV of(38.61%).It was suggested that Brainea insignis played an importanst role in the community.