514 



INDEX 



Papaveraceae^ 438 



Paper, 320, 321 



Paprika, 186 



Parasite, 45, 57 



Parasitism, 116 



Parenchyma, 8, 10, 36 



Parsley, 145, 164, 231 



Parsley Family, 155, 158, 162 



Parsnip, 145, 157 



Partridge Pea, 443 



Pasque flower, 438 



Pea, 145, 182, 486 



Pea Family, 104, 109, 443, 444, 



475, 480, 486 

 Peach, 80, 147, 199 



acreage, 199 



yellows, 416 

 Peanut, 182, 183 

 Pear, 145, 196 

 Pearly everlasting, 459 

 Peat moss, 95, 120, 121 

 Pecan, 287 

 Pectin, 133 

 Pedigree culture, 151 

 Peony, 148, 436, 437, 484 

 Pepper, 225, 226 

 Pepper Family, 104 

 Peppermint, 232 

 Peppers, 149, 186 

 Pepperwort, 440 

 Perfume, 390 

 Persimmon, 148, 214 

 Petal, 69, 70 

 Petroleum, 122 

 Petunia, 149, 488 

 Phaeophyta, 86, 88, 89, 108 

 Phloem, 40, 41, 42 

 Phosphorus, 140 

 Photosynthesis, 16, 23, 26 

 Phycocyanin, 138 

 Phycoerythrin, 138 



Phycomycetes, 419-423 



Phylum, 84 



Pigments, 136, 287 



Pignut, 287 



Pigweed Family, 155, 162 



Piling, 314, 315 



Pine family, 101, 258 



life history, 64, 65, 66 



Pineapple, 149, 215 



Pineapple Family, 214 



Pinedrops, 454 



Pines, 64, 258, 259, 260, 261, 278, 

 314, 316, 317, 318, 319, 

 323, 324, 326, 328, 330, 

 332, 333, 385, 386 



Pinesap, 454 



Pink Family, 104, 108, 482 



Pistil, 68, 69, 73 



Plane tree, 298 



Plant fibers, 345 



Plastics, 322 



Plastid, 7 



Plum, 80, 145, 197 



Plumule, 75 



Plywood, 324, 325 



Pod, 168 



Podophyllum, 380 



Pogonia, 472, 473 



Poinsettia, 149, 487 



Poison ivy, 125 



Poisonous plants, 125, 126 



Poles, 314 



Pollen, 8, 64, 73 

 tube, 73, 74 



Pollination, 74 



Pome, 194 



Pondscum, 10, 27, 108 



Pondweed Family, 105 



Poplar, yellow, 296, 326, 332, 333 



Poplars, 282, 283, 320 



