231 
divided into seventeen volumes, and issued in parts averaging 
about 100 pages each. About five of these parts will constitute 
each volume. Printed schemes giving the proposed sequence of 
orders and contents of volumes may be had on application to the 
Chairman of the Board of Editors. 
No illustration is contemplated, but copious references to pub- 
lished plates and figures will be made a feature. In addition to 
the technical characterizations, chapters dealing with the economic, 
Palzontologic and horticultural aspects of each order will be ap- 
pended. Especial attention will be given to the verification of 
original descriptions, to the examination of type specimens, to the 
Citation of type localities and to geographical distribution. 
No attempt will be made, to treat the groups consecutively, but 
the sequence of orders being tentatively established in advance, 
and the number of genera and species being approximately known, 
it is possible to print parts of all the volumes, or of as many of 
them as is desired, at about the same time. It is hoped that five 
or six parts can be issued annually, beginning in 1895. Several 
Parts are already in preparation. 
Each monographer will be responsible for his own matter, the 
Only restrictions placed on contributors being that they conform 
to a general style, to principles of nomenclature and to citations, 
and that descriptions be extended only to an average limit of a 
certain number of words, this number to be hereafter determined. 
The treatment of these matters will be indicated by sample sheets 
which will be distributed at an early date. It is expected that an 
“Pproximately uniform consideration of species can be secured. 
The editors believe that by prosecuting the work in the man- 
ner above indicated, it will be possible to produce a complete 
Systematic Botany of the country within fifteen years. They fully 
realize the impracticability of such a task being accomplished by 
a few students only, and earnestly desire the aid and support of all 
: merican botanists. Inquiries and communications may be ad- 
ressed t . «Ls Britton; 
0 any of the editors. N a ecuttt 
‘Cratacus PUNCTATA CANESCENS n. var-—Under this name I | 
characterize a thorn collected by Dr. Thos. C. Porter at Easton, . 
Pa, and by the” late Dr. Robbins at Ferrisburg, Vt. The speci- — 
