86 



such as those of Selaginella and lichens forming a turf, or scales 

 on the bark of the ponderosa pine, would not be clear to the stu- 

 dent, the choice of illustrations on the whole is good. One would 

 wish, perhaps, for more thorough labeling of parts. An interesting 

 variation from most texts is the number of illustrations taken from 

 old sources ; Hooke, Grew, Mattioli, and Linnaeus. 



The Pool text is an excellent addition to the more complete 

 type of treatments of introductory botany and will prove valuable 

 to those who wish to utilize in a full 3'ear course the particular point 

 of view as well as thoroughness of text which is presented. 



Liverworts of Southern Michigan* 



M. FULFORD 



In a concise little book, Liverworts of Southern Michigan, 

 Dr. Steere has given a non-technical treatment of the local species 

 whereby a beginner may, of his own accord, either in the field or 

 laboratory, learn to recognize and identify the various local species 

 with the aid of a good hand lens. 



After an introductory section in which the author discusses 

 briefly and clearly the structure and classification of liverworts, 

 where they grow and how to preserve them, the genera and species 

 are described. These descriptions are brief and to the point, but 

 give ample details of the plants involved. 



The Key to the Genera is particularly good and should afford 

 no serious difficulties for the beginner. The photographs by Dr. 

 E. B. Mains and the line drawings by Miss Embry are excellent. 



The author has admirably accomplished his purpose, and we 

 are sure that anyone wishing to begin the study of hepatics in this 

 region will find this book to be of great assistance. We only wish 

 that more species of these infrequently recognized little plants 

 grew in Southern Michigan. 



The book is another of the series of manuals of Natural History 

 pertaining to Southern Michigan but of use over a much wider 

 area. 



* Liverworts of Southern Michigan. William Campbell Steere. Cran- 

 brook Institute of Science. Bull. 17. 97 pages. 22 plates. Bloomfield Hills, 

 Michigan. Price $0.50 paper. $1.00 waterproof cloth. 



