Abstract:Based on pollution tolerant tree species growing in the areas of Pearl River Delta of Guangdong Province, the stem, branch, bark and leaves of 52 species were used to determine the contents of moisture, crude fat, crude ash and caloric value for the selection of fire resistant trees. Species with moisture content ≥40%, crude fat ≤20‰ and crude ash ≥5% are considered to be fire resistant species, viz, Ilex rotunda, Sterculia anceolata, Ficus microcarpa, Prunus phaeosticta, Artocarpus nitidus subsp. lingnaensis, Garcinia multflora, Semiliquidamobar cathayensis, Osmanthus matsumuranus, Cettis tetrandra, Bischofia javanica, Gironniera subaequalis, Liquidambar formosnana, Chukrasia tabularia, Altingia chinensis, Cleidiocarpon cavdleriei, and Kigelia pinnata. Among the above-mentioned species, the first six had caloric value lower than Schima superba (control). It is suggested that these 6 species are most fire -resistant plants for urban forestry in the regions.