THE AMERICAN BOTANIST 75 



exception of Knuth's compendious volumes, there does 

 not seem to be anything else on the subject that is readily 

 accessible. In the present volume, all the devices for se- 

 curing pollination familiar to the investigating student are 

 described and for the most part illustrated by pen-and-ink 

 drawings by the author. There are also eight plates in 

 color. The text is written in a lively style which should 

 appeal to children as well as to others beginning the study, 

 though there is probably a little more emphasis on adapta- 

 tion and the Darwinian aspect of evolution than the mod- 

 ern ecologist would countenance. This, however, may be 

 overlooked in a book of this kind which aims at being both 

 instructive and entertaining. It ought to have an exten- 

 sive use in schools. It is published by the F. A. Stokes 

 Co., New York, at $2.00 net. 



In these days of ecology, plant breeding, and inquiries 

 into the minute anatomy of plants, that form of publication 

 known as a "local Flora" has almost become extinct 

 though now and then a new one appears to remind us 

 that field botanists are still in the field getting considerable 

 pleasure and healthful exercise out of the search for rare 

 plants in their respective localities. We are moved to 

 these reflections by the appearance of Alfred Twining's 

 "Flora of Northeastern Pennsylvania," an admirable list 

 of 1534 species growing in the Lackawanna and Wyoming 

 valleys, with the localities given in which the rarer ones 

 may be found. The book is published by the Everhart 

 Museum, Scranton, Pa., and is built on an earlier "Flora 

 of the Wyoming and Lackawanna Valleys" by Prof. C. O. 

 Thurston. The new list contains a much larger number 

 of species and Mr. Twining is to be congratulated on the 

 thoroughness of the survey that brought them to light. 

 The region covered is one of much interest to the botanist, 



