INDEX ix 



PAGE 



Necessity for Tillage 93 



New York Botanical Garden, The Palm Collection at the ... 82 



Notes on the Flora of Central Chile 32 



"Obtusilobata" Forms of Some Ferns i 



Olive Trees in Palestine, Spontaneous Fission of 57 



Oranges in California 121 



Orchids in the Tropics 212 



Our National Flower 238 



Palestine, Spontaneous Fission of Olive Trees in 57 



Pansies in the Washington Parks 46 



Paper White Narcissus 46 



Paper White Narcissus, The 19 



Peony, The Tree 120 



Perennial, A Good Hardy 192 



Perennial Phloxes from Seed 94 



Philippines, Plants from the 119 



Phloxes from Seed, Perennial 94 



Pink-flowered Locust 143 



Pit and Greenhouse, A Combined 243 



Plant, A Good Greenhouse 20 



Plant Growth on the Isle of Pines, Conditions of 34 



Plant Physiology for the High School 138 



Planting Bulbs in the Fall 237 



Plants from the Philippines 119 



Plants in Pots, Height at Which to Set 69 



Plants of Universal Application 163 



Plants, Temperature of Water for 20 



Plants that Keep a Body-Guard 103 



Plants, The Preservation of Our Native 4 



Plants, The Preservation of Native 159 



Plants, The Resting Period of 154 



Poinsettia 45 



Poinsettia, The 271 



Poisonous Effects of a California Shrub 245 



Pollination of Apple Blossoms 120 



Primulas 270 



Problems, Three Ecological 213 



Propagating Shrubs 68 



Protection Against Cut-worms 169 



Raising Cucumbers 143 



Redwoods, What Forestry Can Do for the 265 



