INDEX 



457 



Sporangiophore of molds, 261* 

 Sporangium of fern, 306*, 307* 

 Sporangium of mold, 261*, 262* 

 Spore chambers of puffball, 271 

 Spore tetrads, 290*, 314 

 Sporidia of rust, 275* 

 Sporidia of smuts, 277 

 Sporophore of puffball, 271* 

 Sporophyte in angiosperms, 337 

 Sporophyte in bryophytes, 290*, 295* 

 Sporophyte in gymnosperms, 321, 325 

 Sporophyte inpteridophytes, 299, 309*, 



Spreading tree type, 21*, 22* 

 Spring wood, 85*, 86*, 87* 

 Spruce, 325-337, 326*, 371-378 

 Spruce, anatomy of, 327*, 328*, 329* 



330 



Spruce, commercial importance of, 375 

 Spruce, embryo and seed of, 335* 

 Spruce, gametophytes in, 334*, 335* 

 Spruce, life history of, 336 

 Spruce, regrowth of, 376*, 378 

 Spruce, second growth of, 375* 

 Spruce, seed production in, 373, 374* 

 Spruce, strobili of, 331*, 332*, 333* 

 Spruce, tolerance of, 372* 

 Spruce and balsam, 373* 

 Spur shoots of apple, 409 

 Stalk cell, 323* 

 Stamens, 162* 



Standard of pea flower, 168, 169* 

 Starch grains, 50* 

 Starch sheath, 224* 

 Stem structure of alder, 91* 

 Stem structure of corn, 109* 

 Stem structure of dicotyledons, 105, 



106* 



Stem structure of lilac, 85* 

 Stem structure of monocotyledons, 



108, 109* 



Stem structure of oak, 86* 

 Stem structure of Salvia, 106* 

 Stems, function of tissues, 98 

 Stems, functions of, 83 

 Stems, growth of, 67*, 70*, 71* 

 Stems, kinds of, 353, 354 

 Stems, multiple, of plantain, 156* 

 Stems, vegetative reproduction of, 



154-157 



Sterigmata of mushroom, 269*, 270 

 Sterilization, 254 

 Stigma, 163, 164*, 169* 

 Stimuli, internal, 29 

 Stimuli, kinds of, 30 

 Stimulus, 27 

 Stipe of mushroom, 268* 



Stolon, 354 



Stolon of Rhizopus, 261* 



Stoma of fern sporangium, 306* 



Stomata, 113*, 114, 115* 



Storage in stems, 98, 99 



Strasburger, Eduard, 56, 59 



Strawberry, flower and fruit of, 404* 



Strawberry, vegetative reproduction 

 of, 155* 



Strawberry plants, 403* 



Strobili, 313 



Structure of stems, roots, leaves, 83, 

 117 



Stylar brush, 412* 



Style, 163, 169 



Subhymenium of mushroom, 269* 



Succession, 440, 442* 



Sugar cane, 430* 



Sugar maples, grove of, 391* 



Summaries : 



Relations of plants to environ- 

 ment, 13 

 Body plan, 23 



Adjustments by tropisms, 44 

 The parts of the cell, 52, 53 

 The cell and the cell theory, 59 

 Growth and cell division, 69-72 

 Structure and physiology of 



trees, 100-103 



Structure of herbaceous stems, 108 

 Seasonal life of bean, 130 

 Seasonal life, 135, 136 

 Variation antt selection, 206-208 

 Evolution, 211 

 Biological sciences, 216 

 Bacteria, 258 

 Fern anatomy, 305 

 Spruce anatomy, 330 

 Angiosperms, 348, 349*, 350 

 Plant associations, 445 



Summer wood, 85*, 86* 



Supernumerary buds, 356 



Suspensor, 319*, 335* 



Sweet potato, vegetative reproduc- 

 tion in, 158* 



Sycamore, wood of, 382 



Symbiosis of lichen, 280* 



Synergidse, 164, 347* 



Tangelo, 183 



Tangerine, 183 



Taproot, 4*, 17*, 356* 



Taraxacum (dandelion), 410* 



Taxonomy, 212 



Teliospores (teleutospores), 275*, 276 



Telophase, 75*, 78 



Terminal bud, 356 



