Spruce, Engelmann, 14, 68; Douglas, 19, 22, 68, 100, 116; Sitka, 170.
Squirrels, 19, 52, 192, 194, 274, 284.
Storms, 267.
Streams of the Sierra, 241, 246, 248; in spring, 256; in summer and autumn, 257.
Sunflowers, crystal, 162.
Swamps, 7.
Talus, earthquake, 140, 259.
Tamarack, 18.
Thoreau, his description of the pistillate flowers of the white pine, 169; on the destruction of trees and shrubs, 356.
Torreys, 131.