252 Brown: THE GENUS CRATAEGUS 
States, published in 1903, one hundred and eighty-five species were 
described —an increase of one hundred and seventy in just six 
years, for Chapman, covering practically the same region, had fifteen 
in 1897. Sargent’s Trees of North America, issued in 1905, con- 
tained descriptions of one hundred and thirty-two species having 
characters such that they can be called trees. This covered all 
of North America, north of Mexico. 
During the past two years new works appeared — Britton’s 
North American Trees and Gray’s New Manual of Botany. The 
genus Crataegus was treated by W. W. Eggleston in both of 
these works. He favors the reduction of the number of species to 
the narrowest limits possible. In the work on trees, he lists fifty- 
one species large enough to be called trees, or tree-like in form ; 
in Gray’s New Manual, sixty-five species and about fifty varieties 
are described, 
After devoting a limited amount of time to the study of the 
forms of the local flora of the Ithaca region, with the help of Mr. 
Eggleston and Mr. John Dunbar of Rochester, we have identified 
about thirty species and four or five varieties. 
Prior to 1896, about one hundred North American species of 
Crataegus had been described ; of these a large percentage are not 
tenable. Since 1896, eight hundred and sixty-six species and 
eighteen varieties have been described (most of them since 1900). 
The proposers of these are as follows : 
BE. LL. Greene, I species. 
G. V. Nash, 1 variety. 
J. K. Small, I species, 
A. A. Heller, I species. 
T. Howell, I species. 
C. HH. Peck, I species, 1 variety. 
J. H. Schuette, I species, 3 varieties. 
F. Ramaley, 2 species. 
C. L. Gruber, 3 species, 2 varieties. 
A. Nelson, 4 species. 
N. L. Britton, 8 species, 2 varieties. 
W. W. Eggleston 1O species, 3 varieties. 
C.D. Beadle, 144 species. 
W. W. Ashe, 165 species, 
C. S. Sargent, 524 species, 6 varieties. 
