Two chaparral species, pointleaf manzanita (Arctostaphylos pungens H.B.K.) and shrub live oak (Quercus turbinella Greene), were analyzed for certain chemical properties known to influence flammability. Half of each sample was analyzed before heating, and the other half after heating for 5 minutes. The losses of crude fat, heat of combustion, and phosphate-phosphorus were statistically significant.