azelnut, 149.

Beaked Willow, 166.

Bean-trefoil Tree, 92.

Bear Scrub Oak, 157.

Beech, American, 161.
Blue, 151.
Cut-leaved, 161.
European, 161.
Purple, 161.
Silver Variegated, 161.
Water, 151.

Benjamin-bush, 131.

Betula, 144-147.

Bhotan Pine, 172.

Bignoniaceae, 127.

Bignonia Family, 127.

Big Shellbark, 142.

Big Tree of California, 192.

Bilsted, 108.

Biota, 193.

Birch, American White, 145.
Black, 146.
Canoe, 145.
Cherry, 146.
Cut-leaved, 146.
European White, 146.
Gray, 145, 146.
Hairy-leaved, 146.
Paper, 145.
Purple-leaved, 146.
Pyramidal, 146.
Red, 147.
River, 147.
Sweet, 146.
Weeping, 146.
Yellow, 146.

Bird-cherry, 99, 100.

Bitternut, 143.

Bixineae, 67.

Black Ash, 124.
Birch, 146.
Cherry, 99.
Gum, 112.
Haw, 114.
Hawthorn, 106.
Oak, 156, 158.
Pine, 175.
Poplar, 170.
Scrub Oak, 157.
Spruce, 179.
Sugar-maple, 86.
Walnut, 141.
Willow, 163.

Blackthorn, 98.

Blue Ash, 124.
Beech, 151.

Bog Willow, 166.

Bow-wood, 137.

Box Elder, 89.
White Oak, 153.

Boxwood, 133.

Bristly Locust, 94.

Brittle Willow, 163.

Broom-hickory, 143.

Buckeye, 82, 83.

Buckthorn, California, 80.
Carolina, 79.
Common, 79.
Southern, 119.
Woolly-leaved, 118.

Buckthorn Family, 79.

Buffalo-berry, 132.

Bullace Plum, 98.

Bumelia, 118, 119.

Burning-bush, 78.

Bur-Oak, 153.

Butternut, 140.

Buttonwood, 139.

Buxus, 132, 133.

Calico-bush, 116.

California Buckthorn, 80.
Maple, 86.

Camellia Family, 69.

Canoe Birch, 145.

Caprifoliaceae, 113.

Caragana, 92.

Carolina Buckthorn, 79.
Poplar, 169.

Carpinus, 150, 151.

Carya, 141-144.

Cashew Family, 89.

Castanea, 159, 160.

Catalpa, 128, 129.

Caucasian Planer-tree, 136.

Cedar, African, 190.
Deodar, 190.
Indian, 190.
Japan, 198.
Lebanon, 189.
Mt. Atlas, 190.
Red, 199.
Silver, 190.
White, 194, 195.

Cedrela, 76.

Cedrus, 189, 190.

Celastraceae, 78.

Celtis, 136, 137.

Cembra Pine, 173.

Cephalonian Silver Fir, 185.

Cephalotaxus, 200.

Cercidiphyllum, 67.

Cercis, 94.

Chaste-tree, 130.

Cherry, 99, 100.

Cherry Birch, 14