This photo was taken in March before many of the shrubs and trees in the valley were in full leaf. Grand Canyon National Park, Coconino County, Arizona. 1974.

Album caption and index card: This matching photograph was taken in March before many of the shrubs and trees in the valley were in full leaf. The preceding photograph (photo no. 36) was taken in August when foliage was fully developed. Because the decrease in density of the plants at A might be the result of differences in seasonal development, additional photographs, taken by John Richardson, Southern Illinois University, in July 1978, were obtained. These photographs (not shown) were taken at a time of maxiumum leaf development and reveal the same decline in the predam flood-line community as in this March view. The dense thicket on the terrace above the boats (at B) was thinned by a wildfire that burned through the thicket in May [...]