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Standard Books on Ferns 



"How Ferns Grow," by Margaret Slosson. With 46 

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



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 

 pains she has studied the various metamorphoses and has recorded in 

 good photographs her interesting results. The transformations are all 

 well shown by the engravings, but she has supplemented these engravings 

 by clear text." — The Nation. 



" Botanical books especially, of late years, have been remarkable for 

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

 lover will want." — N. Y. Sun. 



1 ems, by Campbell E. Waters, of Johns Hopkins University* 

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

 photographs. $3.00 net, by mail $3.34. 



%. A manual for the Northeastern States, thoroughly authoritative and 

 written in a popular style. It covers all the ferns in the region embraced 

 either in Britton's or in Gray's Manuals. A key based on the stalks, 

 as well as one based on frutification, differentiates it from other analytical 



# keys now existing. 



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



# The illustrations are superb." — Dr. F. H. Knowlton, U. S. National Mu- 

 £ seum. 



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

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

 confidently be asserted that no finer examples of fern photography have 

 ever been produced." — Plant World. 



"Our Native Ferns and THeir Allies." with 



Synoptical Description of the American Pteridophyta North of Mexico. 

 By Ltjciex M. Uxderwood, Professor in Columbia University. Revised, 

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



" The elementary part is clear and well calculated to introduce begin- 

 ners to the study of the plants treated of. The excellent key makes the 

 analysis of ferns comparatively easy. The writer cordially commends the 

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

 vascular cryptogams of the United States."— Bulletin of the Torrey Bo- 

 tanical Club, N. Y. 



Henry Holt and Company 



% 29 West Twenty-third Street : : NEW YORK 



