94 
U.S. Nat. Herb. 3: 225. It is apparently common in northern 
Idaho and adjacent Washington and, although found in various 
collections, has always been referred to the very different 2. 
oxyacanthoides, which seems to be confined to the eastern part of 
the continent. 
A. A. HELLER. 
UNIVERSITY OF MINNESOTA, 
MINNEAPOLIS, MINN, 
Reviews: 
Flora of the Amboy Clays.* After many vexatious delays the 
Flora of the Amboy Clays has appeared. It makes a handsome 
quarto volume, uniform with other U.S. Geological Survey Mono- 
graphs, of 260 pages and 58 plates. Its distinguished author 
was one of the fathers of American paleobotany and it is much 
to be regretted that he could not have lived to see the publication 
of his valuable material. But it was not to be, and it is fortunate, 
indeed, that so able an editor was found to carry on the book to 
its completion. It will stand as a monument to the painstaking 
discrimination and acumen of the one and the careful judgment 
of the other. 
The so-called Amboy Clays take their name from Perth Am- 
boy and South Amboy, in New Jersey, and embrace some 350 
feet of clays, usually of much commercial importance, that are 
there best exposed. As a formation, however, the Amboy Clays 
extend from northeastern Maryland diagonally across the State 
of New Jersey, the southern portion of Staten Island and the 
north shore of Long Island to the southern counties of Massa- 
chusetts. These clays have furnished the rich flora, which is the 
subject of the present monograph. 
Biologically speaking the Amboy Clay flora is of much inter- 
est. It consists of 156 species, of which just 100 are described — 
as new to science, besides a number of more or less doubtful 
fragments. The most striking feature of the flora is the great 
* Flora of the Amboy Clays. By John Strong Newberry. A posthumous work, a 
edited by Arthur Hollick, Monographs U. S. Geol. Surv, Vol. 26: Wash.,Gov- — 
érnment Printing Office, 1895 (1896). pp. 260. p/. 58. : 
