Peteika 1913 June 19 Hayfork Belly, 3000-6562 feet, Trinity Co., Calif. mountain. extensive areas of chaparral were seen, dominated by scrubby golden oak, Prunus, Ceanothus cordulatus, Salix, Garrya, Manzanita, and occasional Arbutus? Such chaparral areas were present from 500 feet upward. The entire south face from about 5500 feet upward. is covered with chaparral. Along the periphery of, and occasionally scattered well into the chaparral were young trees, the presence which would suggest that the chaparral was possibly a successional stage persisting over prolonged periods because of certain edaphic factors. One factor in this instance is the exposed, warmer south face. A second factor is the charac- ter of the soil - which is loose and gravelly. The shrub species of the chaparral can withstand apparently the effect of slight surface disturbed by occasional slight slides. Further, there is little accumulation of organic matter as a result of the inclue and looseness of the soil. The two factors (and undoubtedly others) may hinder the germination and establishment of conifers so that the invasion rate of conifers into chaparral is very slow.