INDEX 



Platystigma (Little White Poppy), 



112, s 67. 



Plocamium, 22, Fig. 3, p. 23, s 9. 

 Plum, 179, s 62. 

 Plumbago, s 113. 

 Plumule, 32. 

 Poinsettia, 177. 

 Poison Hemlock, s 94, 

 Poison Oak, 40, 48, 68, 108, 177, 



186, 201, s 21, 28, 64, 121, 124. 

 Poisonous Plants, 25, 157, 178, sir, 



21, 22, 34, 35, 73, 80, 94, 109, 114, 



126. 

 Polemoniaceae (Gilia Family), 569, 



114. 

 Pollen, Definition of, 87. 



Pollination, conveyance of pollen to 

 the stigma. 



Close, of the same flower. 

 Cross, of another flower. 

 Self, without foreign aid. 

 68, 70, 71, 87, 88-112, 114-159* 

 164-171, 180-199, s 26. 27, 39- 

 4i, 50, 52-55, 60-75, 78-87, 91, 

 95, 96, 102, 103, 106, 113, 116- 

 121, 126, 127. 

 Poly gon ace ae, s no, 126. 

 Polypetalae, s no. 

 Polypodium, 72, Fig. 26, p. 73, s ' 



45- 



Polyporus. s 35, 36. 

 Pome (Apple-like Fruit), s 62. 

 Pomegranate, 179. 

 Pond Scum, 17-21, s 6. 

 Pond Weed, 207, s 104, 124. 

 Pop-Corn Flower, s 73. 

 Poplar, 104, Fig. 38, p. 103, s 108. 



See also Cottonwood. 

 Poppy > 110-112, 175, 200, 201, 207, 



Fig. 41, p. in, s66, in, 124. 

 Poppy Family, 112, s 66.. 



Populus, s 60, 108. See also Poplar 



and Cottonwood. 

 Pore-Fungus, see Polyporus. 

 Pores, see Stomata. 

 Portulaca, 174, 207, s 75, 126. 

 Portulacaceae, s no, 11.7. 

 Potato, s 73, 113. 

 Potato Family, (Solanaceae), s 69. 



See also Nightshade Family. 

 Potato Fungus, 53. 

 Potentilla, 75. 

 Prickles, 41. 



Prickly Pear, 189. See also Cactus 

 Prickly Poppy, 112, s 67. 

 Primrose, Fig. 42, p. 113,181, 198,3 



Progress of Weeds, 202. 

 Protection of Plants, 41-50. 

 Protection of Pollen, 87, 90, 92, 



93 etc. See also Pollination. 

 Prothallium, 74, s 43. 

 Protophytes, s 7. 

 Protoplasm, 19, 37, s 4. 

 Protoplast, 21. 



Prunus, s. 65. See also Cherry. 

 Pteridophyles, s 42. 

 Pteris, s 46. 

 Pterospora, s 120. 

 Puff-Ball, 35, 59, s 85. 

 Pumpkin. 182, s 114. 

 Purslane, 174, s no, 126. 

 Pussy Bars, s 74. 

 Putrefaction, s 30. 

 Pyrola, s 120. 



Quince, 107, 178, s 62, 65. 

 Quercus, see Oak. 

 Quinine, s 115. 



Radicle, 32. 



Radish, 175, 176, s 68, 123. 

 Rafflesiaceae, s 109, no. 

 Ragweed, 211, s 91. 



