INDEX. 



271 



Myeelium, 231. 

 Myrsiphyllum, 60, 51. 



Naked buds, 79. 



Nasturtium leaves, starch in, 121. 



Natural selection, 212. 



Nectar, 162, 163. 



Nectar-glands, 163. 



Nectar-guides, 164. 



Nectaries, 163. 



Netted-veined, 87, 88. 



Nitric acid, test for proteids, 24. 



Nitrogen, 122. 



Nocturnal position, 98, 99. 



Node, 15, 39. 



Nourishment, storage of, 17-25. 



Nucleus, 128. 



Nut, 186. 



Nutrient substances, 122. 



Nutrition of plants, 119-123. 



Oak, leaf-arrangement of, 94. 



Oak wood, 53. 



Oat, germination of, 21. 



Obovate, 86. 



Obtuse, 86. 



Odors of flowers, 163. 



Oil, 24. 



Oil, testing seeds for, 24. 



Onion, structure of, 74. 



Onion, tests of for food-materials, 



75, 76. 

 Oosphere, 226. 

 Opposite, 40. 

 Orbicular, 85. 

 Order, 214, 215. 

 Osmose, 35-37, 71. 

 Ovary, 146. 

 Ovate, 85. 

 Ovule, 157-159. 



Ovule, structure of, 159. 

 Oxidation, 9. 

 Oxygen, 118. 

 Oxygen-making, 118. 



Palisade cells, 108. 



Palmate, 88. 



Pampas region, 205. 



Panicle, 134. 



Panicum, 201. 



PapUionaoeous corolla, one which is 



more or less like a butterfly in 



shape, Fig. 119. 

 Parallel-veined, 90, 91. 

 Parasite, 28. 

 Parasitic roots, 28. 

 Parenchyma, 58. 

 Parietal placenta, 148. 

 Parsnip root, study of, 32. 

 Pea, 4, 6, 8, 10, 18. 

 Pear, flowers and fruit, 178. 

 Pedicel, 132. 

 Peduncle, 132. 

 Pepo, 193, 194. 

 Perennial, 33, 34. 

 Perfect, 143. 

 Perianth, 139. 

 Pericarp, 193. 

 Perigynous, 149. 

 Petal, 137. 

 Petiole, 86. 

 Phanerogamous, 216. 

 Phanerogamous groups, 216. 

 Phosphorus, 122. 

 Physiology, vegetable, 2. 

 Pigeon-wheat moss, study of, 235- 



239. 

 Pine, seedling, 17. 

 Pine wood, 60. 

 Pinnate, 87, 89. 



