LaBonte, George A., Douglas A. Stark, and Robley W. Nash, revisers. 

 1973. Forest trees of Maine. 10th ed. Maine For. Dep. Bull. 24, 96 p., 

 illus. Augusta. 



Maryland 



Baker. R. L., and H. W. Dengier. 



1970. Leaf key to common trees in Maryland. Univ. Md. Coop. Ext. 

 Serv. Bull. 238, 26 p., illus. College Park. 

 Brown. Russell, and Melvin L. Brown. 



1972. Woody plants of Maryland. 347 p.. illus. Univ. Md., College 

 Park. 



Massachusetts 



See also: Blakeslee, A. F.. and C. D. Jarvis 1975 G; Foulds, R. T. [n.d.] 

 G: Hibbard. John E. 1965 Conn.; Steele, Frederick L., and Albion R. 

 Hodgdon 1968 G. 



Illick. Joseph S. 



1927. Common trees of Massachusetts: a handy pocket manual of the 

 common and introduced trees of Massachusetts. 110 p. . illus. Ameri- 

 can Tree Association. Washington. D.C. (Out of print.) 



Michigan 



See also: Clark. R. M., and J. W. Andresen 1961 G. 



Billington, Cecil. 



1949. Shrubs of Michigan. 2d ed. Cranbrook Inst. Sci. Bull. 20, 339 p.. 

 illus. (part col., maps). Bloomfield Hills, Mich. [1950] 

 Linn. Robert M. 



1962. Forests and trees of Isle Royale National Park. Wolf 's Eye vol. 

 6, No. 1, 34 p.. illus. Isle Royale Nat. Hist. Assoc, Isle Royale 

 National Park, Houghton. Mich. 

 Michigan Dept. of Natural Resources. 



1970. Simple key to Michigan trees. [4] p.. illus. Forestry Division. 

 [Lansing. ] 

 Otis. Charles H. 



1931. Michigan trees: a handbook of the native and most important 

 introduced species. 11th rev. ed. 362 p.. illus. Univ. Mich. Press. 

 Ann Arbor. (Reprinted 1954.) 

 Smith. Norman F. 



1961. Michigan trees worth knowing. Rev. ed. 60 p.. illus. Hillsdale 

 Educational Publishers. Hillsdale. Mich. (First published 1952, 

 Mich. Dept. Conserv.. For. Div.) 



38 



