INDEX 



Selaginella, 132 ; archegonium, 757; embryo, 

 JJ7,- female gametophyte, 136; habit, 

 133! sporangia, 134; spores, 13$- 



Selection, variable, 307. 



Selective action, 307. 



Sensitive plants, 429. 



Sepal, 252. 



Seta, 100, loi, 103, 104, 105, 113, 116, 120. 



Shoot, permeable regions of, 311. 



Sieve plates, 242, 243. 



Sieve vessels, 242, 243; lole, 394. 



Silphium, fertilization, 26g; male gameto- 

 phjrte, 267; microsporangium, 258. 



Siphonales, 33 ; condusiotis, 37. 



Siphonostele, 133 ; amphiphloic, 157, 160; 

 ectophloic, 157, 162. 



Sleep movements, 455. 



Soil, 312 ; capacity for water, 313 ; effect of 

 roots, 315 ; water of, 313. 



Solids, 302. 



Solutes, 303 ; entry of, 316 ; natural, 303. 



Solution, 300, 303. 



Solvent, 303. 



Soredia, 79. 



Sorus, 1^6, 163, 165. 



Spadix, 277. 



Spathe, 277. 



Spectrum, absorption, 368, 36Q. 



Sperms, 17 ; thallophytes, 18, ig, 28, 30, 36, 

 43t 50, 52, 56; bryophytes, 92, 95, 102, 

 112, 117; pteridophytes, 128, 12Q, 135, 

 140, 148, 167, 178, 444; gymnosperms, 

 IQQ, 201, 2H. 



Spermatium, red algae, 36 ; rusts, 83. 



Spermatophjrtes, 180. 



Spermatozoid, 17, 56- 



Spermogonium, lichens, 79 ; rusts, 83. 



Sphacelaria, 46. 



Sphaerella, i;. 



Sphaerocarpus, 105. 



Sphaeroplea, 27, 28. 



Sphaerotheca, 75. 



Sphagnales, no; conclusions, 114. 



Sphagnum, antheridia, 112; archegonia, 

 113; gametophyte, iii; habit, 1J2, 113; 

 leaf, III; sporophytes, 113, 114. 



Sphenophyllales, 143. 



Sphenophyllum, 143. 



Spiral vessels, 241, 243. 



Spirillum, 11. 



Spongy region, leaf, 230, 251. 



Sporangiophore, 143, 146, 333. 



Sporangium, 3 ; thallophytes, 3, 27, 45, 58, 

 59, 67, 68; pteridophytes, J25, 126, 133, 

 134, 139, 142, '43, '44, 146, 132, 153, 156, 

 157, 160, 163, 164, 165, 352. 



Spores, 3, 16, 62, 147. 



Sporidia, 83. 



\ Sporocarp, 171, 172, 173, 174, '76, '77- 



Sporogonium, 93. 



Sporophores, 62. 



Sporophylls, 122. 



Sporophyte, 32 ; thallophytes, 32, 60, 84 

 bryophytes, 92, 95, P7, 99, 100, loi, 103 

 104, los, 108, log, 113, 114, iiSi 116, "8, 

 iig, 120; pteridophytes, 122, 132, 138, 

 143, 149, 156, 171, 176 ; gymnosperms, 181 

 185, 191, 203, 207, 213, 220, 229. 



Spirogyra, 39. 



Sprout chains, yeast, 70, 71. 



Squirting fungus, 68. 



Stalin cell, 200. 



Stamens, 183, 184, 186, 187, igs, 205, 208, 

 213, 214, 220, 221, 230, 231, 252, 2S3, 256, 



2S7_- 

 Staminodia, 2S1. 

 Starch, 3s8, 37s, 389. 

 Starch grain, 389. 

 Statolith theory, 464. 

 Stegocarpae, 121. 

 Stele, 124, 239, 241. 

 Stem, angiosperms, 239. 

 Stemonitis, 3. 

 Sterigmata, 80, 8g. 

 Stigeodonium, 26. 

 Stigma, 260. 

 Stigmatomyces, 78. 

 Stigonema, 10. 

 Stimulus, 426 ; chemical, 438 ; formative, 



435 ; mechanical, 439 ; morphogenic, 435 ; 



tonic, 449. 

 Stink horns, 91. 

 Stipe, mushroom, 87. 

 Stomata, 109, 146, 230, 251, 319, 320, 327 ; 



regulation of, 327. 

 Stomium, 164. 

 Stoneworts, 41. 

 Storage, 388. 



Straightening, twiners, 469. 

 Strains, sexual, 68. 

 Streaming, 444, 451. 

 Strobilus, 122 ; pteridophytes, 124, 132, 133, 



'44! gymnosperms, 186, 187, 188, i8g, 



192, ig3, igs, 'g6, 204, 205, 206, 208, 2og, 



213, 214, 220, 221, 222, 228, 22g, 230, 231 , 



232; theory of, 123. 

 Stroma, chloroplasts, 367 ; fungi, 76, 77. 

 Style, 260. 



Substratum, fungi, 61. 

 Sugar, 390; cane, 359; fruit, 359; grape, 



3SQ. 

 Sulfur, source of, 379. 

 Summation, 432, 462. 

 Sundew, 387, 454. 

 Sunflower, nutation, 424. 

 Suspensor, angiosperms, 271, 272, 273, 274; 



J 



