xiv LIST OF ILLUSTRATIONS 



Russian "Thistle" 346 



Wing Fruit of Elm 347 



Dandelion Gone to Seed 348 



Cocklebur 350 



Waahoo Bush Displaying Fruit After Leaf- Fall 351 



Explosive Fruits 352 



Timothy Grass in Flower 354 



Grass Flower 355 



Indian Corn Plant 355 



Staminate Flower of Indian Corn . 356 



Ear of Corn or Pistillate Flowers 356 



The Forest 359 



Trunk of Red Oak 360 



White Elm in Flower .......... 364 



Cottonwood Trees by a River 365 



Shelf Pore-Fungus , 367 



Grove of Hard Maples 369 



Denuded Hill Showing Erosion . 371 



Unshaded School-Grounds ......... 376 



Farm Homestead Surrounded by Trees . . . . . -377 



A Wounded Tree Healing 382 



A Street Beautified by Shade Trees 384 



Trees and Vines Improve a House 386 



Spore Dots on a Fern Leaf . .- 389 



Moss-Covered Boulder -39 



Liverwort Encrusting a Cliff 391 



Agaricus Campestris . "... 392 



Development of Mushroom . 393 



Poisonous Toadstool, Amanita . * ; '. 394 



Wood-Destroying Toadstool 395 



