 The dominant trees are oaks, interspersed with other broadleaf and coniferous trees, with an understory of grasses, herbs, geophytes, and California native plants.Oak savannas occur where the oaks are more widely spaced due a combination of lack of available moisture, and low-intensity frequent fires.The oak woodlands of Southern California and coastal Northern California are dominated by coast live oak ("Quercus agrifolia"), but also include valley oak ("Q. lobata"), California black oak ("Q. kelloggii"), canyon live oak ("Q. chrysolepis"), and other California oaks.