INDEX 



455 



Pollen chamber of Zamia, 323* 



Pollen formation, 343* 



Pollen germination, 343* 



Pollen tube, 164*, 323*, 325, 334*, 

 347* 



Pollen tube of Iris, 424* 



Pollination, 166-173 



Pollination, kinds of, 167 



Pollination and inflorescence, 167 



Pollination in locust, 170, 171* 



Pollination in papilionaceous flowers, 

 168, 169* 



Pollination in red clover, 172, 173 



Polyporus squamosus, 273* 



Pome, 364*, 365, 409* 



Pomelo, 183 



Pond lilies, 152* 



Pond-lily association, 440* 



Pontederia, 429* 



Pontederiaceae, 428 



Poplars, 389* 



Populus deltoides, 389 



Potamogeton, 152 



Potato, vegetative reproduction of, 

 150*, 156 



Potato (sweet), vegetative reproduc- 

 tion of, 158* 



Primary root, 356 



Primrose, Lamarck's, 199* 



Proembryo, 335 



Progeotropic, 20*, 30 



Pronuclei, 160, 228 



Prop roots, 193*, 357 



Prophase, 74, 75* 



Prophototropic, 30 



Protandrons flowers, 362 



Protococus, 220, 221* 



Protogynous, 362, 404* 



Protonema of moss, 296* 



Protoplasm, 47* 



Protoplasm, naming of, 55 



Protoplast, 47,* 52 



Protropic, 30 



Prunus (cherry), 407 



Prunus serotina, 407* 



Pteris aquilina, 302-305 



Pteris aquilina, anatomy of, 303*, 304*, 

 305* 



Ptomaine poisoning, 258 



Ptomaines, 257 



Puccinia graminis, 274, 275* 



Puffballs, 270*, 271*, 272 



Pulvini, 28*, 29*, 37, 39* 



Pulvini of bean leaf, 28*, 29* 



Pulvini of clover, 39* 



Ptirkinge, 55 



Putrefaction, 255 



Pyrenoids of Spirogyra, 224* 

 Pyrus coronaria, 408* 



Quarter-sawed oak, 87*, 88*, 89* 

 Quercus alba, 383*-386 

 Quercus alba, flowers and fruit of, 385* 

 Quercus rubra, wood of, 89* 



Raceme, 357* 



Rachis of fern leaf, 299* 



Radish, 401 



Rainfall, forest control of, 368 



R amentum, 299 



Ranunculaceae, 397*, 399 



Raphe, 364 



Raspberries, 405 



Rays, wood, 86*, 87*, 92*, 93*, 94 



Receptacle of flower, 161, 339*, 340 



Receptacle of Fucus, 237* 



Red clover, pollination of, 172, 173 



Red clover, root system of, 111 



Red oak, cuts of, 89* 



Reduction division, 80*, 81*, 82 



Regular flowers, 360 



Reproduction, sexual, 159, 160*, 161 



Reproduction, vegetative, 154 



Resin canals, 326 



Respiration, 120-124, 127* 



Respiration and photosynthesis, 123 



Rhizoids of Ricciocarpus, 287, 289* 



Rhizome, 299,* 353, 354* 



Rhizophore, 317* 



Rhizopus, 259*, 240*, 261*, 262*, 263* 



Ricciocarpus, 288-293 



Ricciocarpus, life history of, 291* 



Ricciocarpus, reproductive organs 'of, 



289* 

 Ricciocarpus, sporophyte and spores 



of, 290* 



Ring-porous wood, 381* 

 Root, functions of, 112 

 Root, hairs of, 110* 

 Root cap, 61*-62*, 63* 

 Root hairs and absorption, 140*, 141* 

 Root pressure, 138* 

 Root system of clover, 111* 

 Root system of corn, 112*, 193*, 357* 

 Root tip, cell structure of, 62*, 63* 

 Roots, anatomy of, 110* 

 Roots, arrangement of, 18, 19 

 Roots, fleshy, fibrous, 357 

 Roots, growth of, 61*, 63*, 65*, 70* 

 Roots, primary and secondary, 4*, 17*, 



193* 



Roots, prop, of corn, 193*, 357 

 Roots, sensitive zone of, 34*, 36* 

 Roots, soil, water, aerial, 357 



