xiv LIST OF ILLUSTRATIONS 



PAGE 



Russian "Thistle" 34^ 



Wing Fruit of Elm 347 



Dandelion Gone to Seed .......•■ 34^ 



Cocklebur 35° 



Waahoo Bush Displaying Fruit After Leaf-Fall ..... 35^ 



Explosive Fruits .......... 35^ 



Timothy Grass in Flower 354 



Grass Flower 355 



Indian Corn Plant .......... 355 



Staminate Flower of Indian Corn ....... 35^ 



Ear of Corn or Pistillate Flowers ....... 35^ 



The Forest 359 



Trunk of Red Oak 360 



White Elm in Flower .......... 3^4 



Cottonwood Trees by a River ........ 365 



Shelf Pore-Fungus 3^7 



Grove of Hard Maples 3^9 



Denuded Hill Showing Erosion ....... 371 



Unshaded School-Grounds 37^ 



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 39^ 



Agaricus Campestris .......... 392 



Development of Mushroom 393 



Poisonous Toadstool, Amanita 394 



Wood-Destroying Toadstool " . 395 



