450 



INDEX 



(fig-). 79. 82 ; of Brown Algae, 

 202; of Conifers, 341 (fig.). 



Sieve tubes, function of, 28, 88 ; of 

 Angiosperms, 28, 29 (fig.), 80 

 (fig.), 82, 85 (fig.) ; of aquatics, 

 171, 174 (fig.) ; of Conifers, 

 339, 340. 341 (fig-) ; of Ferns, 

 292 (fig.), 293 (fig.) ; of second- 

 ary phloem of Dicotyledons, 

 121 (fig.), 130. 



Sigillaria, 314 (fig.). 



Siliceous deposits due to Diatoms, 

 207. 



Silicification of cell-wall, 39, 206. 



Silicified hairs, 104. 



Silk-Cotton Tree (Eriodendron an- 

 fractuosiim) . 103. 



Silkworm disease, 230. 



Silver Goosefoot (Obioiie porlula- 

 coides), 94 (fig.), 133 ; — Fir 

 {Abies). 335, 336 (fig.), 344, 347. 



Silver I^eaf Disease of Plum (Stereum 

 purpureum), 250, 252. 



Silverweed [Poteulilla aiiserina), 102. 



Simple pits, 30 (fig.), 33, 121, 122, 

 276. 



Sinigrin, 48. 



Skeletal tissues, 31-6 (figs.), 72, 



87. 115- 

 Skin-diseases due to Fungi, 253. 

 Sleep-movements, 115. 

 Slime-Fungi (Myxomycetes), 250, 



251, 406. 



Smuts (Ustilagineas), 230, 245, 248, 



252, 407- 

 Soap, 50. 



Soapwort (Saponaria), 48. 



Soft rot of Carrots (Bacillus caro- 

 tovorus), 265. 



Soft rubber, 157 ; — wood, 127. 



Soil Algae, 198, 204, 208, 216 ; 

 — Bacteria, 266, 267 (fig.). 



Soil-differences and plant-distribu- 

 tion, 391. 



Soja-beans (Glycine), 49. 



Solanaceae, 58, 60, 61, 81. 



Solitary crystals, 58, 59 (fig.). 



Soredia (of Lichens), 260 (fig.), 261. 



Sorrel, Wood- (Oxalis acetosella). 95. 



Sori (of Ferns), 291 (fig.), 295, 296 

 (fig.), 397 (fig-)- 



" Souring ' of milk, 265. 



Space-parasites, 260. 



Spartium junceum, proembryo of, 



371 (fig-)- 

 Spawn (of Mushrooms), 248. 

 Spermatozoid mother-cells, 277, 278 



(fig.). 302, 303 (fig-). 319' 



Spermatozoids, 220, 236, 330, 333 ; 



of Algffi, 220, 221 (fig-), 222, 



224, 225 ; of Cycads, 326, 327 



(fig.) ; of Ferns, 302, 303 (fig.) ; 



of Liverworts, 277, 278 (fig.) ; 



of Mosses, 280 ; of Selaginella, 



319, 320 (fig.). 

 Spermogonia (of Rusts), 246 (fig.), 



247. 

 Sphacelaria, growing point of, 16 



(fig-). 17- 

 Sphaei-ella (HcBmaiococcus), i85, 187 



(fig.)- 

 Sphaerotheca castagnei, 244 (fig.) ; 

 S. morS'iivcB, 243 ; S. pannosa, 



243- 

 Sphagnales, 407. 

 Sphagnum, 274, 275 (fig.), 276. 

 Sphenophjdlales, 407. 

 Sphenopteris hceni-nghausii, 329 (fig.). 

 Sphere-crystals (of inulin), 44, 45 



(fig-)- 



Spices, 62. 



Spiderwort (Tradescantia), cell- 

 structure of, 4, 5 (fig.). 



Spinach (Spinacia oleracea), stem 

 of, 86. 



Spinach-family (Chenopodiacea?) , 

 secondary thickening in, 133. 



Spindle-fibres, 23 (fig.), 24, 25 (fig.) 



Spindle-tree (Euonxmns earopcBus), 



139, 359- 



SpircBa ulmaria, 169, 



Spiral fiowers, 354 ; — tracheids, 37 

 (fig.), 113, 293, 340 ; — vessels, 

 35 (fig.). 36,' 68, 80 (fig.), 83 

 (fig.), 89, 172. 



Spireme, 21 (fig.), 22. 



Spirillum, 262, 263 (fig.) ; S. 

 rubruni, 263 (fig.). 



Spirogyra, 16, 195, 307 ; cell- 

 structure of, 7 (fig.), 208; 

 filaments of, 195, 197, 210 ; 

 fragmentation of, 216 ; sexual 

 reproduction (conjugation) of 

 226-8 (fig.). 



Spirogvrabellis, 227 (fig.) ; S. webcri 

 227 (fig.). 



Sponges, " green cells " of, 260. 



Spongy parenchyma, 38 (fig.), 92 

 (fig.), 107, 108 (fig.), 109 (fig.), 

 110; function of. 107, iio; of 

 shade-leaves, 170. 



Sporangia of, Algae, 218, 228 ; 

 Conifers, 345 - 8 (figs.) ; 

 Cycads, 323-6 (figs.), Eqitise- 

 turn, 312, 313 (fig.) ; Ferns, 

 295-300 (figs.), 303, 308, 309 



