INDEX. 



365 



Spiraea (spi-rae'a), 265 



Spirogyra, 19-23, 115-119 



Sporangium (spor-an'gi-um), mucor, 

 126; fern, 158-163; equisetum, 

 176; isoetes, 181; pine, 188, 191 



Sporogonium (spor-o-go'ni-um), 144, 



145, 152 

 Sporophyll, equisetum, 176 ; pine, 



188; trillium, 197 

 Spring beauty, 226 

 Spruce moor, 320-324 

 Stamens, 201, 203, 206 

 Starch, 70-80 

 Stem, 219 

 Stomates, 58, 59 

 Strawberry, 265, 268 

 Sundew, 90, 91 

 Sweet flag, 243 



Sympetalae (sym-pet'a-lae), 274 

 Syncarpous (syn-car'pous), 229, 230 



Taraxacum (tar-ax'a-cum), 281 

 Taxodium (tax-o'di-um), 327 

 Taxonomy (tax on'o-my), 231-235 

 Taxus, 209 

 Tendrils, 219 

 Testa, 208, 210 

 Thallophytes, 217 

 Thallus, 217 

 Thorns, 219 

 Tissues (syopsis of), 68 

 Tissue tension, 46-48 

 Toad flax, 277 

 Touch-me-not, 294 

 Transpiration, 51-54, 56-59 

 Trillium, 194 

 Trillium erectum, 231, 232 

 Tropophytes (trop'o-phytes), 288, 

 289 



Tubers, 219 



Tubiflorae (tu-bi-flo'rae), 275 

 Turgescence, 28-30, 45-49 

 Turgidity, 45-49 

 Turgor, 28-30, 45-49 



Ulmaceae (ul-ma'ce-aa), 255 

 Ulmus, 255 

 Ulva, 217 

 Umbel, 227 



Uncinula (un-cin'u la), 134-138 

 Unifolium (u-ni-fo'li-um), 237 

 Uromyces (u-ro-my'ces), 87, 88 

 Urticiflorae (ur-ti-ci-flo'rae), 255 



Vacciniaceee (vac-cin-i-a'ce-?e), 274 



Vaucheria (vau cher'i-a), 120-124 



Venus fly-trap, 89, 91 



Viola, 260 



Violaceae (vi-o-la'ce-ae), 260 



Violet family, 260 



Virgin's bower, 298 



Wake robin, 232 

 Walking fern, 331 

 Wheat rust, 129-133 

 White pine, 184-193 

 \Vhortleberry, 274 

 Wild lettuce, 296 

 Willow family, 250 

 Witch hazel, 332 



Xerophytes (xer'o-phytes), 288, 289 

 Yew, 209 



Zonal distribution, 306 

 Zygospore, zygote, 117, 118 



