10 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
clature is now antiquated. Dr. P. A. Rydberg’s Flora of Colorado! 
is very satisfactory for use in the extreme northern part of the State. 
Even here, however, many plants will be found which have not been 
reported from Colorado and hence are not contained in that work, 
many of our Southwestern species seeming to reach the northern limit 
of their range just below the Colorado line. The new edition of 
Coulter’s Rocky Mountain Flora, as revised by Prof. Aven Nelson, 
can be used in a limited way in northern New Mexico, but it will be 
found to describe only a fraction of our plants. 
The material upon which this flora is based is chiefly that in the 
United States National Herbarium, in the herbarium of the New 
Mexico College of Agriculture and Mechanic Arts at Mesilla Park, and 
in the private herbarium of E. O. Wooton, lately acquired by the 
National Herbarium. In the National Herbarium are found sets of 
nearly all the larger New Mexican collections, both early and recent, 
such as those of Fendler, Bigelow, Wright, the first Mexican Boundary 
Survey, Heller, Wooton, Earle, Metcalfe, and Standley. These 
include duplicate types of most species that have been described from 
the State. Of particular value are the large collections made by Dr. 
EK. A. Mearns in connection with the Mexican Boundary Survey of 
1892 and 1893, and by members of the Biological Survey of the United 
States Department of Agriculture in connection with their studies of 
the fauna of New Mexico. There are also several smaller collections 
in the same herbarium of which no duplicates exist. 
The herbarium of the Agricultural College contains probably the 
largest assemblage of New Mexican plants that has hitherto been 
gathered. Here are found not only sets of the more recent generally 
distributed collections, but several thousand plants collected by the 
present writers of which few duplicates were obtained. Local col- 
lectors in different parts of the State have forwarded collections from 
time to time, some of which are of great interest. 
The Wooton herbarium contains duplicates of many of Mr. 
Wooton’s collections deposited in the herbarium of the Agricultural 
College, besides many specimens not to be found elsewhere. It also 
includes sets of the plants collected by Dr. C. L. Herrick and Miss 
A. I. Mulford. 
The New Mexican ranges given for the listed species are based upon 
the specimens in these herbaria. We have also examined New Mexi- 
can material of certain groups in the herbarium of the New York 
Botanical Garden, besides collections lent by Prof. T. D. A. Cockerell, 
now of Boulder, Colorado, and Miss Charlotte C. Ellis, formerly of 
Placitas, New Mexico. 
The work of preparing the manuscript of the flora was carried on 
chiefly at the National Herbarium during the years 1910, 1911, and 
1 Colo. Agr. Exp. Sta. Bull. 100. 1906. 
