37 



13. Head of Sebec Lake, Piscataquis Co. 2552-2677 



No. 1828 was collected at camp 4, near Maxfield, and no. 201 1 



at Rowland. 



New Yokk Botanical Garden. 



REVIEWS 



Keller and Brown's Flora of Philadelphia* 



This handbook, based chiefly upon data patiently gathered 

 during many years by the members of the Philadelphia Botanical 

 Club and their friends, should provide a marked stimulus to 

 further study of the flora of the district of which Philadelphia is 

 the center. The species enumerated are not described, but a full 

 system of keys permits fairly accurate determinations in the field 

 without the use of a more cumbrous text-book, while in each 

 case there is a reference to the page of Britton's Manual where a 

 description may be found. Recent work upon Crataegus has 

 compelled special treatment of this genus, and the key to the 

 eighty-five species has been prepared by Mr. B. H. Smith. 



In general plan this volume resembles strikingly Porter's Flora 

 of Pennsylvania, published about two years ago ; it includes within 

 its scope, however, the plants of the southeastern portion only of 

 Pennsylvania, and in addition those of northern Delaware and of 

 the southern two-thirds of New Jersey. The two books are 

 worthy models for future ones of their class. There is nothing 

 relating to geographical distribution nor to ecological conditions 

 within the region, but an omission of this kind causes no regret 

 in the case of a work with such an artificial geographical limit and 

 such a definite purpose as a field manual. 



The thin paper used is so transparent as to interfere with the 

 clearness of the text. However, lightness and compactness are 

 of importance in a flora intended for use in the field, and in this 

 instance a book of 368 octavo pages has been reduced to half an 

 inch in thickness and a pound in weight. Typographical errors 

 seem to be fewer than might reasonably be expected. 



* Keller, Ida A., and Brown, Stewardson. Handbook of the Hora of Philadelphia 

 and Vicinity. Pp. viii 4- 360. Philadelphia, 1905. (For sale by Stewardson Brown, 

 Acad, of Natural Sciences, Logan Square, Philadelphia. $2.00 net ; by mail, ^2.10. ) 



