VOLUME XXII NUMBER 1 
PSOLANICAL (Ae 
FULY 1896 
ROSAD AMERICAN. I. 
OBSERVATIONS UPON THE GENUS ROSA IN NORTH AMERICA. 
FRANCOIS CREPIN. 
To the Editors of the Botanical Gazette: 
The preface to the observations on American roses, which it 
is my intention to contribute from time to time, I shall put in 
the form of a letter, which will permit me to enter into the sub- 
ject more easily. Recently I asked whether your excellent 
journal would grant me the courtesy of its pages to address 
American botanists upon the roses of their country, thinking 
that I would reach them better than if I should continue to pub- 
lish my observations in European journals. You have kindly 
granted my request, and I hasten to take advantage of it. 
In the first place, I would call the attention of your readers 
to the fact that twenty years ago (1876) I published a mono- 
_ graph of the American roses,’ in which I gave a résumé of our 
knowledge at that time. Ten years afterwards the late Sereno 
Watson published a similar work,? but based upon more abundant 
material than had served for my monograph. This monograph, 
of incontestible merit and containing contributions to our knowl- 
edge, was after all simply a preparation for a complete presen- 
1“ Prodrome d’une monographie des roses américaines,” in Bull. Soc. bot. Belg. 
——-, 1876. 
ot a“ A nso and revision of the roses of North America,” in Proc. Amer. 
Acad. 20: —-. 1885. 
