No. 414.] REVIEWS OF RECENT LITERATURE. 505 
The histological characters of senega root, as it occurs in the drug 
market, are discussed by Professor Sayre in the Druggists’ Circular 
for February, and it is found that little structural difference exists 
between Polygala Senega and P. alba, from which it is derived. - 
In Pittonta for January Dr. Greene presents descriptions of a con- 
siderable number of newly differentiated species of various groups, 
and some interesting incursions into the genus Bidens. 
Professor Sargent, in the Botanical Gazette for January and Rho- 
dora for February, adds to the large number of species of Cratzgus 
that are being described from this country. 
An address on the cotton plant, by Dr. W. H. Evans, has been 
printed by the Cotton Manufacturers! Association. 
A monograph of Melilotus, by O. E. Schulz, with fruit and 
other illustrations, is contained in Heft 5 of Vol XIX of the 
Botanische Jahrbücher. 
A monograph of the genus Siparuna, by Dr. Janet R. Perkins, as 
“ Beiträge zur Kenntnis der Monimiacez, III,” is separately dis- 
tributed from Heft 5 of Vol. XXVIII of the Botanische Jahrbücher. 
The genus Sophia, as it occurs in New Mexico, is analyzed by 
Cockerell in the January number of the Bulletin of the Torrey Club. 
The first fascicle of Vol. XX of the Mémoires de la Société Lin- 
néenne de Normandie consists mainly of a study of the structure and 
development of the conducting system in stem and leaf of the 
Nyctaginez. 
From a review of Jaennicke’s papers on Platanus, in the Bota- 
nisches Centralblatt of F ebruary 13, it appears that the favorite shade 
tree known as 7. acerifolia is regarded as a probable hybrid between 
the Old World plane, Z. orientalis, and the American P. occidentalis, 
and not as a variety of the former, as has been commonly supposed. 
Rather poorly printed reproductions of winter and summer photo- 
graphs of a superb white oak are given in American Gardening for 
January 26. : 
: An anatomical study of Eriocaulon decangulare, by Holm, appears 
in the Botanical Gazette for January. 
The experiences, in Colombia, of a collector of Odontoglossum 
crispum are detailed by H. A. Sandback in Gartenwe/t of January 19. 
The cultivation of Agave in German Fast Africa is discussed by 
Hindorf in Der Zropenpflanzer for January. 
