320 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
August 6. North Cheyenne Canyon, South Cheyenne Canyon, 
El Paso County, Colorado. 
7. Near switch west of Arena, Jefferson County, Colorado. 
8-10. Tolland, Gilpin County, Colorado. 
11. Golden, Jefferson County, Colorado. 
12. Valverde, Denver County, Colorado. 
13, 14. Windsor, Weld County, Colorado. 
17. Julesburg, Sedgwick County, Colorado; Ogallala, Keith 
County, Nebraska. 
18. North Platte, Lincoln County, Nebraska. 
To Prof, Elsworth Bethel, of Denver, Colorado, with whom TI col- 
lected June 13 to 15, to Mr. G. E. Osterhout, of Windsor, Colorado, 
with whom I collected June 16 to 18, July 20 to 28, and August 13 
and 14, and to Prof. A. O. Garrett of Salt Lake City, Utah, with whom 
I collected June 29 to July 1, and July 12 to 15, | am under obliga- 
tions for scientific assistance and unstinting hospitality. 
Of all species of Scrophulariaceae seen collections were made, 
these at as many localities as possible. Duplicates were freely 
included and these have been distributed to leading herbaria. 
Descriptions of fresh flowers were made and field notes taken of 
other features. It would be difficult to overestimate the value of 
such records, 
Since my return from the Rockies in August, 1915, much time 
has been devoted to the study of these Scrophulariaceae. At first 
I planned to consider little more than the species of the route 
traversed, extending my study to the northern limit now adopted, 
but definitely excluding the species of the southern tier of counties 
in Colorado and of southern and southwestern Utah. This southern 
country includes many species possessed in common with the 
northern portions of New Mexico and Arizona, and many or most 
of these do not reach the main line of the Denver & Rio Grande 
Railroad, along which I collected. But certain causes have led 
to the inclusion of these. 
Rydberg’s Flora of the Rocky Mountains, recently published, 
includes all species to the southern boundary of Colorado and Utah, 
and he had desired me to extend the range of this study to the same 
limit. Also, in asking from herbaria the loan of specimens, exclusive 
of southernmost Colorado and southern and western Utah, I have 
received in all cases full representation from these entire states. 
It has seemed appropriate, in view of the courtesy extended and the 
opportunity thus afforded, to make full use of these specimens. 
The study of this additional material has delayed the present report, 
but the chance to review the rich collections of Jones, Ward, Brande- 
gee, and many others has made the delay worth while. 
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