t Standard Books on Ferns 



A 



J| "HOW Ferns GrOW," by Margaret Slosson. With 46 

 g| plates by the author. Large 8vo. $3.00 net, by mail $3.34. 



J A valuable contribution to fern literature in that it not only enables 

 ^ fern students to distinguish different species of mature ferns, but points 

 ^ out characteristics of the different kinds at all stages of development, 

 ^ and shows the genetic relations of ferns to each other and to the rest of 

 «! plant life. The plates, nearly all reproducing ferns at their natural size, 

 «| are particularly excellent. Published 1906. 



«% "No one has hitherto devoted, as the present author does, a whole 



* book to a readable account of the youth of ferns. . . . With great 

 A pains she has studied the various metamorphoses and has recorded in 



* good photographs her interesting results. The transformations are all 

 4 well shown by the engravings, but she has supplemented these engrav- 



* ings by clear text.*' — The Nation. 



4 ''Botanical books especially, of late years, have been remarkable for 



* wealth and beauty of illustration, but even among these "How Ferns 

 4 Grow" is notable. The pictures are purely scientific, nearly all are the 



* size of nature, and they are so numerous and so carefully arranged as 



* to make the text almost superfluous. ... A beautiful book that every 

 J| fern lover will want." — N. Y. Sun. 



A "Ferns," byCampbell E. Waters, of John Hopkins University. 

 t% 362 pp., square 8vo. Over 200 illustrations from original drawings 

 J and photographs. $3.00 net, by mail, $3.34. 



4 A manual for the Northeastern States, thoroughly authoritative and 



* written in a popular style. It covers all the ferns in the region em- 

 4 braced either in .Britton's or in Gray's Manuals. A key based on the 

 4 stalks, as well as one based on frutification, differentiates it from other 

 ^ analytical keys now existing. 



J "The ideal fern-book. . . . The best fern-book that has appeared. 



* The illustrations are superb." — Dr. F. H. Knowlton, U. S. National 

 ^ Museum. 



J "The best fern-book — beautiful and scientific." — Critic 



^ "Likely to prove the leading popular work on ferns. ... It can 



J confidently- be asserted that no finer examples of fern photography have 



* ever been produced." — Plant World. 



* "CKir Native Ferns and Their Allies." With 



J Synoptical Description of the American Pteridophta North of Mexi- 



J| co. By Lucien M. Underwood, Professor in Columbia University. 



g| Revised, xii -f 156 pp. $1.00 net, by mail, $1.10. 



2| "The elementary part is clear and well calculated to introduce be- 

 ^ ginners to the study of the plants treated of. The excellent key makes 

 ^ the analysis of ferns comparatively easy. The writer cordially corn- 

 el mends the book. It should be in the hands of all who are especially 



* interested in the vascular cryptograms of the United States."— Bulletin 

 ^ of the Torrey Botanical Club, N. Y. 



* Henry Holt and Company 



4 29 West Twenty-Third Street. NEW YORK 



