"How to Know the Wild Flowers." Frances Theodora Parsons.
"Field Book of American Wild Flowers." F. Schuyler Mathews.
{122}
For the ferns and grasses it will be found worth while to consult:
"How to Know the Ferns." Frances Theodora Parsons.
"The Fern Collector's Guide." Willard Nelson Clute.
"New England Ferns and Their Common Allies." Helen Eastman.
"The Grasses, Sedges, and Rushes of the North United States." Edward Knobel.
For the study of the monarchs of our forests the following books will all be found exceedingly useful:
"Manual of the Trees of North America." Charles Sprague Sargent.