PENNELL—SCROPHULARIACEAE OF THE ROCKY MOUNTAINS. 321 
Specimens have been seen from most of our leading herbaria. 
The herbaria in which a given collection is to be found are indi- 
cated by the following letters: 
. Academy of Natural Sciences, Philadelphia. 
. University of Colorado. 
. State Museum, Denver, Colorado. 
. Brooklyn Botanic Garden. 
Field Museum of Natural History. 
. Gray Herbarium.} 
. Royal Botanic Garden,’ Kew, England. 
. Missouri Botanical Garden. 
. University of Pennsylvania. 
. Rocky Mountain Herbarium, University of Wyoming. 
Stanford University.! 
. United States National Herbarium. 
. New York Botanical Garden. 
. New York State Museum. 
To the custodians who have generously aided by lending material, 
I am much indebted. 
Also, I have seen the herbarium of Prof. A. O. Garrett and the 
large herbarium of Mr. George E. Osterhout. The latter is of special 
value for the Colorado species. While I have not as yet seen the 
collection at the Gray Herbarium, through the kindness of Mr. J. 
Francis Macbride I have verified all types there. The type of Pen- 
stemon petiolatus T. S. Brandeg., at the University of California, has 
been critically examined at my request by Dr. H. M. Hall, formerly 
of that institution. 
In the following account, keys to species are included and descrip- 
tions are provided for all species considered new. So far as possible all 
types have been verified. Fullsynonymy is given, but only for names 
of the area considered. The paragraph concerning distribution is 
primarily so restricted, and includes statements of environment; of 
altitude followed by that of life zone; of the province or physio- 
graphic natural region; of the actual surface distribution; and, in 
cases where the species occurs beyond the area considered, of its 
wider range. So far as the facts are known, statements of flowering 
seasons are made. These are compiled from records accompanying 
specimens seen, and not accepted from literature. By this process 
our information, while accurate, is obviously imperfect and will 
need many additions from future field observation. 
Specimens are listed only from the area outlined. Under Collinsia 
and Scrophularia, genera with but one species each in our area, none 
are cited, although to afford a basis for the summary of the range 
AVE ADS SoS 
NK GY 
1 Herbaria not seen, but to which duplicates of my specimens have been sent. 
