99 



no less than twelve species of Crataegus under ('. meridiana. 

 Incidentally 18 species of Crataegus are described, though the 

 authors state that "125 species (trees and shrubs) have been 

 described in the area covered and Sargent includes 35 arbores- 

 cent hawthorns in the same area." The student who is not a 

 specialist in hawthorns should be grateful for their handling of 

 the genus. For most species one common name and one scientific 

 are given. For a few two or more common names are given and 

 where there may be confusion because of changes in the use of 

 scientific names, synonyms are given. We suspect that in a few 

 cases the common names given are ones the authors think should 

 be used, rather than ones that are in use. For example — Moun- 

 tain Red Oak (Quercus borealis), Red Oak (Q. Borealis var. 

 maxima), Swamp Red Oak (Q. Shumardii) and Southern Red 

 Oak (Q. rubra). Though, of course, anyone who can distinguish 

 these species will use the scientific names. Altogether the book 

 is admirably adapted to its purposes, — it is attractive and it is 

 easily used. 



George T. Hastings 



