290 
Rubiacese, 259 
Rubiale Cohort, 259 
Rueworts, 261 
Runners, 61 
Rushes, 244 
Rush, tissue, 57 (fig.) 
Rusts, 169 
Rutacez, 261 
Rye, 249 
SaBIaAcEs, 261 
Saccharomyces, 110 
Sac-fungi, 155 
Sacs, 155 
Sac-spores, 155 
Sago-palm, 251 
Salicacese, 254 
Salvadoracee, 258 
Samydacee, 260 
Sandalworts, 255 
Santalaces, 255 
Sap (Cell sap), 13 
Sap, flow of, 75 
Sapindacee, 261 
Sapindale Cohort, 261 
Sapotacese, 258 
Sap, no circulation of, 7 : 
Saprolegnia, 142 @ : 
Saprolegniacee, 136 
Saprophytes, 78, 82 
Sargasso Sea, 147 
Sargassum, 147 
Sarracenia, 272 (fig.) 
Sarraceniacez, 263 
Saxifragaceee, 260 
Saxifrages, 260 
Scalariform Vessels, 23 
Scale-mosses, 187 
Scales, 62, 68 
Schizomycetes, 108 
Scitaminer, 244 
Sclerenchyma, 17 
Scorzonera, milk-vessels, 19 (fig.) . 
Scotch Pine, 228, 224 
Scouring Rush, 198 
Screw-pines, 244 
Scrophulariacer, 257 
Scutellum, 242 
Sea-lettuce, 118 
Sea-lettuce, 118 (fig.) 
Sedge, embryo, 281 (fig.) 
INDEX. 
>» Sedges, 243 
Seed, 215 
Seeds, germination of, 219, 24%, 
251 
Selagineze, 257 
Selaginella, 210 
Selaginella, 208, 209 (figs.) 
Selaginella, bundle, 47 (fig.) 
Selaginellacex, 209 
Sepals, 227 
Sequoia, 224 
Sequoia, sieve-tube, 22 (fig.) 
Sexless Plants, 105 
Sexuality, first appearance of 115 
Shield-ferns, 203 
Sieve-tissue, 20, 27 
Sigillariaceze, 210 
Sigillarids, 210 
Silver-maple, tissue, 18 (fig.) 
Simarubacezx, 261 
Sleep of Plants, 93 
Slime-moulds, 5, 106 
Smilax, 240 
Smuts, 173 
Snowdrop, 249 
Snowflake, 249 
Soapworts, 261 
Soft Bast, 44 
Soft Tissue, 15, 26 
Solanacee, 257 
Southern Pine, 224 
Spawn, 179 
Spermatia, 169 
Sperm-cells, 169 
Spermogones, 169 
Spherotheca, 160 
Sphagnacee, 191 
Sphagnum, 192 
Spiderworts, 244 
Spindle trees, 261 
Spines, 63 
Spiral Vessels, 23 
Spirillum, 109 (fig.) 
Spirocheete, 109 (fig.) 
Spirogyra, 124, 128 
Spirogyra, 124 (fig.) 
Spleenworts, 203 
Sporangia, 63 
Sporangium 126 
Spore, 126 
Spore-case, 126, 1 
