5 6 



Minnesota Plant Life. 



Sedge, Flower (Engr.), 210 



Manufacture of matting, 216 



Position of, 349 



Resemblance to grass, 212 



Rootstock, 455 



umbel, 213 



Bulrush- (Engr.) 214 



Carex- (Engr. 215), 215 



Cyperus- (Engr. 211), 213 



Smut, 48 



Seed, Definition, 180, 184 



distinguished trom spore, 183 

 Distribution, 18, 344, 416 



habit, 344 



Origin, 160, 440 



How produced, 180 



Structure, 420 



-coat, Definition, 182 



-plant, 184, 520, 522 



-plant, Ancestors, 440 



-plant, Breeding habits, 181 



-plant, Higher, 197, 517 



-plant, Lower, 194, 197, 517 



-plant and primitive seedless 



plants, Relation between, 195 

 Cocoanut, 420 



Pine, 182 



Water-lily, 182 



wheat, Smut spores, 50 



Yew, 185 



Seedless plants, Relation be- 

 tween lower seed-plants and 

 primitive, 195 



Seedlings, 233, 235 



Tree, 507 



Self defense of plants, 505 



-preservation, Instinct of, 510 



Seneca snakeroot, 307 



snakeroot, Medicinal value, 307 



Senecio, 412 



Senna, 280, 296, 297 



American, 297 



Sensitive fern (Half-tone, 432), 166 

 pea, 297 



plant, 280, 427, 507 



plant, Wild, 297 



Sequoia, 483 



Serrate-leafed wintergreen, 351 



Serum therapy, 108 



Shad-bush, 287 



Shade plant (Half-tone, 430, 

 431, 432, 441), 219, 418 



Sheepberry, 390 



viburnum, 391 



Shelf-fungus, 57, 59 



Shelf-fungus, Birch, 57, 58 



fungus, Poisonous, 59 



fungus, Toadstool-like, 59 



Shell-bark hickory, 243, 244 



Shepherd's-purse, 275, 278 



purse, Mildew, 46 



Sherburne county, 327 



Shield-fern, 166 



Water-, 459 



Shingles, Manufactured from 



white cedar, 190 



Manufactured from white 



pine, 186 



Shinleaf, 351 



Shoe-pegs, Manufactured from 



birch, 247 



Shooting-star, 358, 359 



Shore plant, 447 



plant, Distribution, 451 



Shoreweed, 387 



Showy milkweed, 366 



Shrub, 428 



Dwarf, 428 



Mesophytic, 477 



Shrubby heather, 469 



prairie evening-primrose, 335 



Silica, Deposited by algae, 32, 41 



Deposited by diatoms, 40 



Deposited by scouring-rush, 175 



Silk, Corn, 207 



Silky cornel, 34* 



dogwood, 428 



prairie-clover, 301 



Silver buffalo-berry, 333 



-leafed maple, 238 



-leafed poplar, 238 



-leafed prairie-clover, 300 



Silverberry, 332, 333, 465 



Sinter formed by algae, 31 



Skin-fungus, 55 



Skull-cap, 375, 376 



Skunk-cabbage (Half-tone, 218), 



197, 217, 218, 219 



-cabbage, Warming-up color, 218 



currant, 284 



Slender nettle, 254 



Slime-mould, 26, 27, 438, 485, 493, 499 



-mould, foam patches, 28 



-mould, Lime-encrusting, 28 



-mould, Number in Minnesota, 27 



-mould parasites, 27 



-mould, Plants or animals, 27 



-mould, Roots of cabbage, 27 



-mould, Roots of turnip, 27 



