290 



INDEX. 



Rubiacese, 259 

 RiU)iale Cohort, 359 

 Rueworts, 261 

 Runners, 61 

 Rushes, 244 

 Rush, tissue, 57 (fig.) 

 Rusts, 169 

 Rutacese, 261 

 Rye, 249 



Sabiace^, 261 

 Saccliaroniyces, 110 

 Sac-fungi, 155 

 Sacs, 155 

 Sac-spores, 155 

 Sago-palm, 251 

 Salicacese, 254 

 Salvadoracese, 258 

 Samydaceae, 260 

 Sandalworts, 255 

 Santalacese, 255 

 Sap (Cell sap), 13 

 Sap, flow of, 75 

 Sapindaceae, 261 

 Sapindale Cohort, 261 

 Sapotacese, 258 

 Sap, no circulation of, 75 

 Saprolegnia, 142 

 SaprdlegniacesB, 136 

 Saprophytes, 78, 82 

 Sargasso Sea, 147 

 Bargassum, 147 

 Sarracenia, 272 (fig.) 

 Sarraceniacece, 263 

 Saxifragacese, 260 

 Saxifrages, 260 

 ScalarifOrm Vessels, 23 

 Scale-mosses, 187 

 Scales, 62, 63 

 Schizomycetes, 108 

 Scitaminese, 244 

 Sclerencliyma. 17 

 Scorzonera, milk-vessels, 19 (flg.) 

 Scotch Pine, 233, 234 

 Scouring Rush, 198 

 Screw-pines, 344 

 ScrophulariacesB, 257 

 Scutellum, 242 

 Sea-lettuce, 118 

 Sea-lettuce, 118 (fig.) 

 Sedge, embryo, 231 (fig.) 



Sedges, 243 



Seed, 215 



Seeds, germination of, 319, 34S, 



251 

 Selaginese, 257 

 Selaginella, 210 

 Selaginella, 208, 309 (figs.) 

 Selaginella, bundle, 47 (fig.) 

 Selaginellacese, 309 

 Sepals, 337 

 Sequoia, 324 



Sequoia, sieve-tube, 22 (fig.) 

 Sexless Plants, 105 

 Sexuality, first appearance of 115 

 Shield-ferns, 203 

 Sieve-tissue, 20, 27 

 SigillariaceEe, 210 

 Sigillarids, 310 

 Silver-maple, tis.suc, 18 (flg.l 

 Simarubacea;, 261 

 Sleep of Plants, 98 

 Slime-moulds, 5, 106 

 Smilax, 240 

 Smuts, 173 

 Snowdrop, 349 

 Snowflake, 349 

 Soapworts, 361 

 Soft Bast, 44 

 Soft Tissue, 15, 36 

 Solanaceae, 357 

 Southern Pine, 224 

 Spawn, 179 

 Spermatia, 169 

 Sperm-cells, 169 

 Sperm ogoncs, 169 

 Sphaerolheca, 100 

 Sphagnaceae, 191 

 Sphagnum, 193 

 Spiderworts, 244 

 Spindle-trees, 261 

 Spines, 63 

 Spiral Vessels, 33 

 Spirillum. 109 (fig.) 

 Spirochaete, 109 (fig.) 

 Sl3irogyra, 124, 128 

 Spirogyra, 124 (fig.) 

 Spleen worts, 203 

 Sporangia, 63 

 Sporanghim 126 

 Spore, 126 

 Spore-case, 126, 1 



