i6 



they are regarded as escapes that ha\'e not become naturalized. 

 One of these, Berheris vulgaris, is referred to as having frequently 

 escaped, but due to the effort being made to exterminate it 

 "this shrub will not become a member of our state." 



The treatment of species is conservative, forms that inter- 

 grade are considered as one, the many opportunities to sub- 

 divide species being ignored. For example a special study was 

 made of the poison ivy, — "the study suggests that the low erect 

 forms are branches of underground stems; that the thick-leaved 

 forms are always found in places exposed to heavy winds and 

 direct sunlight; and the hairy-fruited forms are rare and are 

 distributed throughout our area, and have no other character 

 to distinguish them. " The sand cherry, Prunus pumila, referred 

 to as not well understood, is taken to include Prunus cuneaia 

 P. susquehanae, which have been described from the state. 



The nomenclature followed is that of the International or 

 Vienna Code. Where the name used differs from that in either 

 the 7th edition of Gray's Manual or the 2nd edition of Britton 

 and Brown's Illustrated Flora, the other names are given, other- 

 wise synonyms are omitted. In most cases the only common 

 name used is that found in Standardized Plant Names, where 

 plants are not listed in this, the name that seems most commonly 

 used is given, with the idea that each plant should be known 

 by but one common name. The descriptions are clear and 

 complete for each species, the distribution throughout the state 

 is given in detail, while under the head of remarks are such 

 items as the uses of the shrub in ornamental planting, its real 

 or reputed medicinal value, questions of variation or habitat 

 and the need of conservation. 



There is a key to all the genera, under each of these is a key 

 to the species. The keys are based chiefly on the leaf and twig 

 characters. The book is illustrated with full page plates of each 

 species made from photographs of herbarium specimens. The 

 specimens have been so carefully prepared that in most cases 

 the use of fresh material would have added nothing in value. 

 Plant lovers and users of Indiana are to be congratulated on 

 having a book of this nature so well done in every respect. 



G. T. Hastings. 



New York. 



