INDEX 
Orange, seedless, origin of, 34-35; 
Japanese, 170-171 
Palm, date, 58-59, 94-95, 102-103; 
cocoanut, 94-95 
Palo-verde, 61, 74 
Parasites, 153 
Parsley family, 57 
Peach, member of rose family, 8- 
9; grafting of, 98-99 
Peanut, 112-113 
Pear, member of rose family, 8-9 
Persimmon, 150-151 
Phylloxera, 31, 80 
Pine, age and fertilization of, 63; 
fighter of winter storms, 84-85; 
outside grower, 154 
Plum, 8 
Poison, ivy, oak, sumac, 78, 120; 
varnish, 79; of rattlesnake, 120 
Poison ivy, cure for, 121 
Pollen, 10, 13, 14, 41, 63, 102-103, 
108-109, 142-143 
Polygala, fringed, 113 
Potassium permanganate, 120-121 
Potato, has poisonous relatives, 2- 
3; how grown, 22; sweet, 122- 
123 
Prickly pear, 100, 162-163 
Puffballs, 77 
Pumpkin, member of gourd family, 
18; earth’s biggest fruit, 44-45 
Quince, 8 
Radish, 57 
Raspberry, 8-9 
Rhubarb, 178 
Rice, 12 
Roots, as pumps, 28-29, 186-187 
Rose family, 8-9 
Rose of Jericho, 110-111 
Rubber, 20-21 
Rubber tree, 64-65, 72, 73 
Rue family, 49 
Rust, black stem, 82-83; apple, 
162 
Sahuaro, growth of, 60-61; has 
turned leaves into thorns, 74; 
houses woodpeckers, 188-189 
Salt, poisons trees and vegetables, 
6-7 
Seeds, carried by wind, 10; carried 
by animals, 11; with wings, 90- 
91, 106-107, 164 
Smoke bush, 79 
“Sow bread,” 113 
Spore, of wheat rust, 82-83; of 
other fungi, 116-117 
Spruce, 84-85 
Squash, 18 
Squirrels, as seed planters, 22, 46- 
47, 124-125 
Starch, likeness to sugar, 24-25 
Stumps, Douglas fir, 132-133 
Sugar, elements of, 16; made by 
leaves, 16-17; food for plants, 
24-25; origin of, 148; made from 
beets, 149, 176-177; made from 
maples, 159 
Sugar cane, member of grass fam¬ 
ily, 12; how grown, 22; origin 
of, 148 
Sunflower family, 38-39 
Sunflower, origin of, 174-175 
Telegraph plant, 181 
Thistle, member of sunflower 
family, 39, 66; Canada, 140- 
141 
Thorns, act as leaves, 74, 75 
Tobacco, 2 
Tomato, 2-3, 175 
Trees: apple, 70, 92-93; 156— 
157; cedar, 84-85; cherry, 136- 
137; cocoanut, 94-95; cone¬ 
bearing, 62-63; cotton, 4-5, 164— 
165; cottonwood, 90; cypress, 
84—85; date, 58-59, 94-95, 102- 
195 
