Foliage of each species was sampled at 26 paired locations in the San Francisco Bay area.Eucalyptus globulushad significantly higher concentrations of Mn, Ca and Na, but significantly lower concentrations of Cu, Fe, Zn, P, NO3‐N and Kjeldahl‐N than didQuercus agrifolia. Concentrations of K and Mg did not differ between species. The relative concentration series for the species were similar: N>Ca>K>Mg>Na>P>Mn>Fe forQ.agrifoliaand Ca>N>K> Mg>Na>Mn>P>Fe forE.globulus. Correlations between species were statistically significant for concentrations of Fe and Ca only. Thus, for these elements analysis of one species could be used as an indicator of the other.