382 



INDEX 



de Saussure, 6 

 Schizom.ycetes, 265 

 Schizophyceae, 265 

 Schizophyta, 265 

 Schleidcn, 6 

 Scion, 151 

 Sclerenchyma, 331 

 Scutellum, 198, 199 

 Secondary tissues, 149 

 Sedge, 365 

 Sedum, 166, 189 

 Seed, 13, 198, 199, 344 



coat, 348 



development of, 198, 345 



dispersal of, 200, 201 



evolution of, 254 



germination of, 202 



origin of, 344 



plants, 13-17, 344-366 

 Seedling, 202 



Seed-production, process of, 196 

 Segregation, Mendelian, 213-219 

 Selaginella, 336, 337 



female gametophyte of, 338 

 Selaginellales, 336 

 Self-fertilization, 198 

 Self-pollination, 194 

 Self-sterile, 194 

 Sepal, 185, 188 

 Serum, 288 

 Seta, 316, 321 

 Sexual cells, 184 

 Sexual reproduction, 184 



advantages of, 184 



origin of, 246, 247 



organs, multicellular, 312 

 Sexuality, in Mucorales, 290 

 Shield fern, 14 

 Shoot, 63 

 Shrub, 88, 90 

 Sieve-tube, 97, 98, 99 



in vein, 68 

 Sieve-plate, 98, 99 

 Silo, use of, 137 



"Silver grain" of oak wood, 107 

 Simple leaf, 64 

 Siphonales, 272 

 Skunk Cabbage, 365 



Smuts, 297 



Snapdragon, inheritance in, 218 



Soil, 23-35 



air in, 29 



bacteria, 32 



crumbs, 24 



dissolved substances in, 30 



essential chemical elements in, 31 



floccules, 24 



organic matter in, 30 



organisms in, 31 



rock particles in, 24 



water in, 24-29 

 Solitary flower, 193 

 Solomon's Seal, leaf of, 63 

 Soredium, 303 

 Sorus, 328, 331 

 Spadix, 365 

 Spathe, 365 



"Species Plantarum," 5, 260 

 Specific name, 260 

 Spectrum, 71 



of chlorophyll, 71, 72 

 Sperm, 247, 267 

 Spermagonia, 297, 298 

 Spermatia, 297 



Spermatophyta, 13-17, 344-366 

 Sphagnales, 319 

 Sphagnum, 319, 320 

 Spike, 193 



Spindle, in mitosis, 141 

 Spirillum, 285, 286 

 Spirogyra, 274, 275 

 Spongy layer, of leaf, 66, 67 

 Sporangiophore, 289 

 Sporangium, 267, 329, 331 



plurilocular, 278, 279 

 Spore, 11 



Sporocarp, 333, 334 

 Sporogonium, 313 

 Sporophore, 300 

 Sporophyll, 335, 336 

 Sporophyte, 248, 250, 311 

 "Sport," 225 

 Squash, germinating pollen of, 197 



inheritance in, 221 



root growth in, 145 



sieve tube of, 99 



