158 THE VARIOUS FORMS OF PLANTS 



each year new species are added to the lists There are about 

 110,000 species of flowering plants and nearly as many flowerless 

 plants. The latter consist of over 3500 species of fernlike 

 plants, some 16,500 species of mosses, over 5600 lichens (plants 

 consisting of a partnership between algae and fungi), approxi- 

 mately 55,000 species of fungi, and about 16,000 species of algae. 



REFERENCE BOOKS 

 ELEMENTARY 



Sharpe, A Laboratory Manual for the Solution of Problems in Biology. American 



Book Company. 



Andrews, Botany All the Year Round, Chap. X. American Book Company. 

 Atkinson, Lessons in Botany, Chaps. Ill, XIX-XXIX. Ginn and Company. 

 Conn, Bacteria, Yeasts, and Molds in the Home. Ginn and Company. 

 Coulter, Plant Studies, Chaps. XVII, XXIV. D. Appleton and Company. 

 How to Grow Mushrooms, Bui. 53, U.S. Department of Agriculture. 

 Mushroom Poisoning, Cir. 13, U.S. Department of Agriculture. 

 Parsons, How to Know the Ferns. Charles Scribner's Sons. 



ADVANCED 



Atkinson, Mushrooms, Edible and Poisonous. Andrews and Church. 



Bergen and Davis, Foundations of Botany (Cryptogamic portion) . Ginn and Com- 

 pany. 



Coulter, Barnes, and Cowles, A Textbook of Botany, Vol. I. American Book Com- 

 pany. 



De Bary, Comparative Anatomy of Phanerogams and Ferns. Clarendon Press. 



De Bary, Comparative Morphology and Biology of the Fungi, Mycetozoa, and Bacteria. 

 Clarendon Press. 



Goodale, Physiological Botany. American Book Company. 



Grout, Mosses with a Hand Lens. A. J. Grout. 



Leavitt, Outlines of Botany. American Book Company. 



Marshall, The Mushroom Book. Doubleday, Page, and Company. 



Sedgwick and Wilson, General Biology. Henry Holt and Company. 



Strasburger, Noll, Schenck, and Schimper, A Textbook of Botany. The Macmillan 

 Company. 



Underwood, Our Native Ferns and their Allies. Henry Holt and Company. 



Underwood, Molds, Mildews, and Mushrooms. Henry Holt and Company. 



Yearbook, U.S. Department of Agriculture, 1894, 1897, 1900. 



