Part 19

Salix, genus (Willows), 117.

Sargent, Prof. Charles S., 92.

Sequoias, 72.

Service-berry, 205.

Shad-bush, 205; flowers, *206.

Skunk-cabbage, 188.

Some Other Trees, 185.

Spice-bush, 193; flowers, *194; berries, 234.

Spruce, Colorado Blue, 65.

Spruce, Norway, 69; cones, *49.

Spruce, White, cones, *71.

Spruces, 65.

Squirrels as nut-eaters, *179.

Strobiles (cones) of spruce, 69.

Sweet-gum, 219.

Sycamore, 214, *215; fruits, *217.

Tree-warden law, 35.

Tropical trees, 225.

Tulip (and Elm), 131, 145.

Tulip flowers, *133; structure of, 148.

Tulip tree in winter, *148.

Walnut, Black, 160; in winter, *162.

Walnut, English or Persian, 164.

Walnut, White, 164.

Washington, tree planting in, 32.

Whitewood, 145.

Willow, Basket, 104.

Willow, Black, 110.