1913] CURRENT LITERATURE 343 
Britton and Brown’s Illustrated flora 
This well known work, issued in 1896, has reached a second edition.s 
About 300 pages have been added to the text, and the number of species 
also in testing out the numerous “new species” that have been described 
since the first edition. The enthusiasm for new species has been recognized, 
and the sober second thought has been applied. Some have been relegated 
to synonymy; others have been noted for further study; and of course some 
have been accepted. 
The area included is probably well known, but a statement of it may be 
helpful. _ It extends from the Atlantic Ocean westward to the 102d Meridian, 
So as to include the whole of Kansas; and northward from the parallel of the 
southern boundary of Virginia and Kentucky to the northern limits of Labra- 
dor and Manitoba. The western limit is crossed only to include the whole of 
Nebraska. ; 
The nomenclature follows the code recommended by a commission of the 
Botanical Club of the American Association in 1907, and therefore is somewhat 
at variance with the Vienna Code of 1905. A unique and extremely valuable 
feature of the work is the citation of the type species of each genus. So far as 
the reviewer knows, this has never been done on so extensive a scale, and it 
must have meant an enormous amount of labor. 
The authors are to be congratulated upon this fresh and very helpful con- 
tribution to the botanists of the country. Probably not all can own these 
three large volumes who can own a manual, but they should be so distributed 
in libraries as to be accessible to all who wish to name plants within the area 
included.—J. M. C. 
A plant chemistry 
Plant physiologists will welcome the appearance of Haas and HIL1’s4 
treatise on the chemistry of plant products. Section I (49 pp.) is devoted to 
ae 
3 Britton, N. L., and Brown, A., An illustrated flora of the Northern United 
States, Canada, and the British Possessions. Second edition, revised and enlarg ‘ 
In three volumes: Vol. I (Ophioglossaceae to Polygonaceae), pp. xxi+680; Vo . H, 
(Amaranthaceae to Loganiaceae), pp. iv-+735; Vol. III (Gentianaceae to Compositae), 
PP. 637. New York: Charles Scribner’s Sons. 1913. 
‘ Haas, Paut, and Hitt, T. G. An introduction to the chemistry of plant prod- 
ucts. 8vo. pp. 401. London: Longmans, Green & Co. 1913. 

