Floristic Analysis of the Evergreen Broadleaved Forest Community along an Urban-Rural Gradient in Guangzhou

Floristic composition of the evergreen broadleaved forest in Maofeng Mountain,Baiyun Mountain,and Liantang,as an urban-to-rural gradient of Guangzhou,was analyzed based on community data.The results indicated that the community in Maofeng Mountain was the richest in species diversity,with 87 families of vascular plants including 155 genera and 212 species,dominant families of the flora were Rubiaceae,Euphorbiaceae,Lauraceae,Agrostidoideae,Rutaceae,Myrsinaceae,and Fagaceae.Vascular plants in Baiyun Mountain plot consisted of 168 species,belonging to 72 families,and 121 genera.Dominant families of the flora were Rubiaceae,Lauraceae,Moraceae,Agrostidoideae,Euphorbiaceae,and Aquifoliaceae.However,Liantang community included only 55 families,88 genera and 102 species.Dominant families of the flora were Rubiaceae,Lauraceae,and Euphorbiaceae.As for generic distribution,the pantropic areal-type represented the majority of genera,followed by old world tropics and tropical Asia,while typical genera were rare and showed the basic features of lower subtropical flora in these three communities.There were three genera of E.Asia in Baiyun Mountain,four genera of E.Asia and one genera of endemic to China in Maofeng Mountain.