Abstract
Ruyuan County islocated in north of Guangdong Province,at(24°28′)~(25°06′N).and(112°52′)~(113°29′E).According to our investigations and statistics,there are(1 910) species of wild seed plants which belong to 753 genera and 171 families in Ruyuan County.Based on their geographical distribution,171 families are classified into 11 areal-types,among them Pan-tropical element is dominant((57.14%)),and the tropical elements make up(68.57%).753 genera are classified into 15 areal-types,among them Pan-tropical element is dominant((21.26%)),and the tropical elements make up (58.19%).(1 910) species are classified into 15 areal-types,among them endemic to China element is dominant((53.53%)),and the tropical elements make up(29.25%).The dominant families in this area are Actinidiaceae,Lardizabalaceae,Styracaceae,Cornaceae,Rubiaceae,Hamamelidaceae,Theaceae,etc.Most of them are tropical and subtropical families.Comparing the Composition of the flora with those of 4 neighbouring regions,the flora of Ruyuan is quite similar to those of Lechang.
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