INDEX 



601 



All numbers refer to pages, heuvy tj'pe indicating illustrations. 



Polygonacew, Buckwheat Family 

 Polygonales, Buckwheat Order 

 Polygonum Convolvulus, Climbing 



Buckwheat 

 Polypodiacece, Polypody Family 

 Polypody Family: male-fern, 179; 



pteris, 537 

 PolyporacecE, P o r e-m u s h r o o m 



Family 

 Pome, 365 

 Pond-scum, 478, 479, 480, 490, 



558 

 Pond-scum Family: pond-scum, 



479, 480 

 Poplar, 241, 263, 264, 377, 414, 



415; wood, 263 

 Poppy, 208, 406, 407 

 Poppy Family, 361, 398, 406, 407: 



opium poppy, 182, 183 

 Poppjr-oil, 296 



Poppy, Opium, see Opium Poppy 

 Poppy Order, 363, 398, 408, 409 

 Populus tremuloides, Poplar 

 Porcupine- wood, 272 

 Pore-mushroom Family: amatlou, 



241 

 Pores of wood, 252, 538 

 Poricidal dehiscence, 302; of an- 

 thers, 379 

 Portable boats, 284 

 Portidacacece, Portulaca Family 

 Posts, 258, 270 

 Potash in grains, 31 

 Potassium, 74 



Potato berries, poisonous, 210 

 Potato, sweet, 43, 68, 59, 379, 



416, 417; white, 43, 59, 60, 210, 



382, 416, 417 

 Potentialities of protoplasm, 572 

 Pot-herb Jute, 232 

 Pot-herbs, 55 

 Powderjr mildew, 499, 500 

 Powdery-mildew Family : powdery 



mildew, 500 

 Preference, power of, 569 

 Prehistoric food-plants, 124 

 Prickly Sago Palm, 109, 110 

 Primary leaves, 318, 319; tissue, 



542 

 Primitive centers of agriculture, 



122, 123 

 Primitive man, 302 



Primitive versus degenerate forms, 

 549 



Primrose Family, 401 



Primrose Order, 401 



PriiHulaceoe, Primrose Family 



Primiilales, Primrose Order 



Princes of the Vegetable Kingdom, 

 389 



Principes, Palm Order 



Printing-ink, 294, 295 



Printing-paper, 224 



Progress and peace, 468; in evolu- 

 tion, 466; made in spite of com- 

 petition, 468 



Progressive fixity of growing struc- 

 tures, 571 



Prolific multiplication, 512 



Prosenehyma, 530 



Protection, organs of, 321, 538 



Proteid, 33, 74, 114, 115, 471 



Protein in foods, 114 (see also Pro- 

 teid) 



Prothallial cells, 556 



Prothallus, 533, 536, 551 



Prothallus-cell, 546 



Protonema, 523, 526 



Protoplasm, 471; artificial, 562; 

 fundamental properties of, 571; 

 potentialities of, 572 



Protoplast, 473 



Protoplasts, artificial, 564; fusion 

 of, 560 



Prunus Amygdalus, Almond 

 Cerasus, Sour Cherry 

 domesHca, Plum 

 Persica, Peach 

 serotina, Wild Black Cherrj' 



Prussic acid in cherry leaves, 204; 

 in cherry stones, 205 



Pseudo-fibers, 225, 239 



Pseudopodium, 525 



Pseudo-root, 481, 521, 536 



Pseudo-shoot, 481 



Pseudo-woods, 256, 272 



Pleridophyta, Pteridophyte Divi- 

 sion 



Pteridophyte Division, 548 



Pteridophytes, 394, 396 



Pleris, 537 



Pubescent, 343 



Pulse, 35, 40 



Pulse Family, 365, 398, 399, 410, 



