458 



VEGETABLE PHYSIOLOGY 



of estimating rate of transpiration 

 current, 81 



Salvinia, 107 ; germination of mega- 

 spore of, 430 



Santalacecc, 200, 342 



Saprolegnia, 393, 419, 449 



Saprophytes, 121, 185, 341 



Sarracenia, 135, 189 



SAUSSUKE, DE, on Opuntia, 296 



Saxifraga, 247; 336 



Saxifragacea, 292 



Scirpus, 27, 29 



Sclerenchyma, 21, 25, 29 



Scrophularia, 442 



Scrophulariacea, 200, 342 



Scutellum, epithelium of, 246, 249 



Scyphanthus, 387 



Secretion, 261 



Seed, 429 ; formation of, 432 ; struc- 

 ture of, 434 ; germination of, 448 



Selaginella, prothallium of, 430 



Selective power, 175, 182 



Self-sterility, 443 



Sense organs, 400 



Sensitiveness, variations of, 378 ; 

 localisation of, 378, 382, 401 ; 

 delicacy of, 385, 409 ; mainte- 

 nance of, 408 



Sex, differentiation of, 423 



Sexual cells, 421 



Sieve-tubes, 170, 218 



Silica, 50, 133, 273 



Silicates, 136, 180 



Silicic acid, ] 36 



Silicon, 129, 136, 175, 180 



Sinigrin, 239, 254 



Skeleton, of plastid, 2, 37 ; of plant, 

 25,37 



Sleep movements, see Nyctitropic 

 movements 



Slime fungi, see Myxomycetes 



Sodium, 129, 136, 175, 179 



Soil, composition of, 67 



Sorus, 441 



Spermatium, 436 



Spermatozoids, 423 



Sphagnum, 19 



Spirogyra, 145, 152, 411, 427 



Splachnitm, 185 



Sporangia, 419 



Spores, 419, 426 



Sporophyte, 426 



STAHL on method of detecting escape 

 of watery vapour, 90 



Starch, appearance of, during photo- 

 synthesis, 153 ; probable cause of 

 appearance of, in leaf, 156 ; forma- 

 tion of, as evidence of activity of 

 chlorophyll apparatus, 156 ; depo- 



sition of, in chloroplasts, 214, 228 ; 

 removal of, from leaves, 224 ; 

 storage of, 228 ; deposition of, by 

 leucoplasts 229, by protoplasm 

 231 ; digestion of, 249 ; secretion 

 of, 264 



Statoliths, 383 



Stele of root,. 69 



Stimulation, 367 ; nature of, 369 ; 

 purposeful nature of responses to, 

 369, 406 ; localisation of, 378, 386 ; 

 after-effects of, 398 ; perception 

 of, 406 ; latent period of, 407 



Stimulus, nature of, 367 ; instances 

 of rhythmic, 371, 374; of lateral 

 light, 377 ; of gravitation, 379 ; of 

 contact, 383; of moisture, 390; 

 of oxygen, 392 ; chemical, 391 ; 

 relationship of response to, 406 ; 

 of fertilisation and pollination, 

 446 



Stomata, 33, 75, 92 ; number of, 

 in different plants, 94 ; mode of 

 action of, 94 ; regulating influence 

 of, on transpiration, 95 ; relation 

 to gaseous interchanges, 112, 117 



Storage of food, 211, 224 



STKASBURGER, on composition of cell- 

 wall, 43 ; on evaporation of water 

 from cell-walls, 100 



Stratification of cell-wall, 44 



Style, reserve materials in, 227 



Stylogonidia, 420 



Stylospores, 420 



Suberin, 271 



Sugar, formation of, 153, 156 ; fer- 

 mentation of, 301 



Sulphur, in proteins, 161, 175 ; mode 

 of absorption of, 136, 176 



Sundew, see Drosera 



Sunlight, influence of, on transpira- 

 tion, 95 



Surplus food, construction of, 209 



Symbiosis, 185, 195 



Synergidse, 433 



Tegumentary system, 19 



Telegraph plant, see Desmodium 



Temperature, influence of, on root- 

 pressure, 85 ; on transpiration, 96 ; 

 on respiration, 296 ; range of, for 

 different functions, 319 ; fluctua- 

 tions of, 320 



Tendrils, 385 



Tensions, in hollow stems, 30 ; in 

 growing organs, 316 



Testa of seed, 434 



Thalictrum, 439 



