INDEX 



Selaginefla, 132 ; archegonium, 137; embryo, 

 137; female gametophyte, 136; habit, 

 133; sporangia, 134; spores, 135. 



Selection, variable, 307. 



Selective action, 307. 



Sensitive plants, 429. 



Sepal, 252. 



Seta, 100, 101, 103, 104, 105, 113, 116, 120. 



Shoot, permeable regions of, 311. 



Sieve plates, 242, 243. 



Sieve vessels, 242, 243; role, 394. 



Silphium, fertilization, 26q; male gameto- 

 phyte, 267; microsporangium, 258. 



Siphonales, 33 ; conclusions, 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, 156, 163, 165. 



Spadix, 277. 



Spathe, 277. 



Spectrum, absorption, 368, 36Q. 



Sperms, 1 7 ; thallophy tes, 18, 19, 28, 30, 36, 

 43, 50, 52, 56; bryophytes, 92, 93, 102, 

 112, 117; pteridophytes, 128, 129, 135, 

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

 199, 201, 211. 



Spermatium, red algae, 56 ; rusts, 83. 



Spermatophytes, 180. 



Spermatozoid, 17, 56. 



Spermogonium, lichens, 79 ; rusts, 83. 



Sphacelaria, 46. 



Sphaerella, 75. 



Sphaerocarpus, 105. 



Sphaeroplea, 27, 28. 



Sphaerotheca, 75. 



Sphagnales, no; conclusions, 114. 



Sphagnum, antheridia, 112; archegonia, 

 113; gametophyte, 111; habit, 112, 113; 

 leaf, in; sporophytes, 113, 114. 



Sphenophy Hales, 143. 



Sphenophyllum, 143. 



Spiral vessels, 241, 243. 



Spirillum, 11. 



Spongy region, leaf, 250, 251. 



Sporangiophore, 143, 146, 333. 



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

 SO, 67, 68; pteridophytes, 125, 126, 133, 

 134, 130, 142, 143, 144, 146, 152, 153, 156, 

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



Spores, 3, 16, 62, 147. 



Sporidia, 83. 



Sporocarp, 171, 172, 173, 174, 176, 177. 

 Sporogonium, 95. 



Sporophores, 62. 



Sporophylls, 122. 



Sporophyte, 32 ; thallophytes, 32, 60, 84 

 bryophytes, 92, 95, 97, 99, 100, lot, 103 

 104, 105, 108, 100, 113, 114, 115, II0 » 118, 

 iiq, 120; pteridophytes, 122, 132, 138. 

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

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



Spirogyra, 30. 



Sprout chains, yeast, 70, 71. 



Squirting fungus, 68. 



Stalk cell, 200. 



Stamens, 183, 184, 186, 187, 195, 205, 208, 

 213, 214, 220, 22i, 230, 231, 252, 253, 256, 

 257- 



Staminodia, 281. 



Starch, 358, 375, 389. 



Starch grain, 38Q. 



Statolith theory, 464. 



Stegocarpae, 121. 



Stele, 124, 239, 241. 



Stem, angiosperms, 239. 



Stemonitis, 3. 



Sterigmata, 80, 89. 



Stigeoclonium, 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, 250, 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, 

 144; gymnosperms, 186, 187, 188, i8q, 

 iq2, 193, iqs, ig6, 204, 205, 206, 208, 209, 

 213, 214, 220, 221, 222, 228, 229, 230, 231, 

 232; theory of, 123. 



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



Style, 260. 



Substratum, fungi, 61. 



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

 359- 



Sulfur, source of, 379. 



Summation, 432, 462. 



Sundew, 387, 454. 



Sunflower, nutation, 424. 



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



