INDEX 
103; Douglas fir, 132-133; dwarf, 
146-147; elm, 42-43; evergreen, 
84-85; fig, 59; fir, 84-85; hevea, 
21; Japanese orange, 170-171; 
juniper, 84-85; locust, 180; 
mango, 79; maple, 90, 158-159; 
nut, 124-125; oak, 40-41, 46-47, 
154, 184-185; orange, 34-35; 
palm, 58-59, 70, 94-95, 102-103, 
154-155; peach, 98-99; pine, 62- 
63, 84-85, 154; rubber, 64^65, 72; 
spruce, 84-85; willow, 90 
Trees, poisoning of, 6-7; roots 
of, 28-29, 186-187; in city, 46; 
grafting of, 98-99, 134-135, 146- 
147; carry fire insurance, 104- 
105; heal wounds, 144-145 
Trifoliate orange, 170-171 
Tulip, 50 
Turnip, 56-57 
Twigs, 26 
Watermelon, member of gourd 
family, 18; native of Africa, 126, 
127 
Wax berry, a poison sign, 78 
Weeds, spread by man, 160-161 
Wheat, member of grass family, 
12, 68; origin and growth of, 68- 
69; rust, 82-83 
Willow, 90 
Winds, carry seeds, 10, 43, 90-91, 
106, 164; fertilize grass, 13; fer¬ 
tilize pines, 63; carry wheat rust, 
82-83; fertilize dates, 102-103 
Woodpecker, 188-189 
Yucca, 96-97, 155 
196 
