INDEX. 



261 



Mosaic arrangement, 25, 27; 37. 

 Mosses, 87, 107, 110, 113, 118, 188, 



194, 209, 214. 

 Motile leaves, 9, 10, 11, 49, 198, 



199. 



Mould, 109. 

 Mullein, 43, 44. 

 Mushrooms, 157. 



N 



Nectar, 123, 158. 

 Nelumbium, 180. 

 Nicotiana, 80. 

 Nightshade, 26. 

 Nitrogen, 153. 

 Nodes, 54. 

 Nuphar, 92. 

 Nutrition, 3, 149. 

 Nymphaea, 178, 180. 







Oak, 69, 101. 



Oak forest, 145, 243. 



(Edogonium, 111. 



Orchids, 98, 99, 126, 127, 132, 133, 



134, 135, 136, 189. 

 Organs, 3. 

 Ornithogalum, 81. 

 Ovary, 79, 80, 125. 

 Ovules, 78, 79, 80. 

 Oxalis, 10, 50, 199. 

 Oxygen, 29, 138, 153. 



Palisade tissue, 39, 40, 43, 205. 

 Palms, 86, 87, 228. 

 Pandanus, 103. 

 Parasites, 106, 150. 

 Passion vine, 62. 

 Pastures, 238. 



Pellionia, 24. 



Pentstemon, 137. 



Peony, 78. 



Petals, 78, 79, 80. 



Petioles, 15, 26, 35, 55. 



Phlox, 80. 



Photosynthesis, 28, 29, 150, 152, 



153, 156. 

 Physiology, 149. 

 Pickerel weed, 181, 182. 

 Pines, 63, 65, 66, 112, 115, 117, 



190, 227, 228. 

 Pirus, 79. 

 Pistil, 77, 79, 80. 



Pitcher plant, 155, 156, 157, 158. 

 Pith, 83, 84, 107.. 

 Plains, 213, 215, 216. 

 Plankton, 174. 

 Plant body, 2. 

 Plant societies, 1, 146, 162, 168, 



174. 



Plastid, 152. 

 Platycerium, 100. 

 Plumes, 112, 113, 114, H6, 117. 

 Plumule, 51, 140. 

 Pollen, 77, 111, 112, 115, 121, 



123. 



Pollination, 77, 115, 122, 123. 

 Polygonatum, 35. 

 Ponds, 142, 175, 178, ISO, 184. 

 Pondweed, 176, 181, 182. 

 Potato, 74, 76. 

 Potentilla, 43,' 79. 

 Prairies, 208, 222, 234, 237. 

 Prickles, 146. 



Prickly lettuce, 12, 197, 198. 

 Primrose, 137. 

 Procumbent stem, 57. 

 Profile position, 197, 198. 

 Pronuba, ISO, 131. 

 Prop roots, 99, 103, 104, 105, 106, 



247. 



