PENNELL—SCROPHULARIACEAE OF THE ROCKY MOUNTAINS. 381 
ein the U.S. National Herbarium, no. 1012411, collected on deep clayey loam, 
Battlement National Forest, Colorado, altitude 2,700 meters, in flower, July 15, 1912, 
by A. F. McDuffie (U. S. Forest Service, no. 7919). 
To be placed in the key before P. scariosus, P. garrettii, and P. cyanocaulis, and to 
ted as follows: 
Corolla glandular-puberulent externally; pedicels and sepals strongly papers eg 
cent; inflorescence laxer 
Corolla glabrous externally; pedicels and sepals sparsely acmnaaitenon: in- 
florescence more congested....... P. scariosus, P. garrettii, P. cyanocaulis. 
