MUNz AND JOHNSTON: PLANTS OF CALIFORNIA 41 
which are in the Centranthifolii, this species can be quickly sep- 
arated by its unique tone of red and by its smaller, stouter, de- 
cidedly bilabiate corollas. It isa well marked species and a 
fitting addition to the interesting penstemon flora ef the Providence 
Mountains. 
» Penstemon Clevelandii var. Stephensi (Brandegee) comb. nov. 
Penstemon Stephensi Brandegee, Zoe 5: 151. 1903. 
During one of our trips to the Providence Mountains we made 
a small collection of this little known plant, which is apparently 
rare in the type region; for Mr. Brandegee informs us that he 
collected only enough for the type sheet, a full one, while our 
collection, M, J & H 4274, was enough for only a few duplicates. 
A critical study of our collection and of the type seems to in- 
dicate that P. Stephensi finds a very close relative in P. Cleveland 
Gray, a species restricted to the canyons about the Colorado Des- 
ert and in the mountains to the west of it. Our collection of P. 
Stephensi, as well as the type, is so similar to certain collections 
of P. Clevelandi (e.g., Hall 1160 and 2149 and Parish Bros. 1216) 
that as far as gross aspect, size and vegetative characters are con- 
cerned, they might be of one and the same collection. There is, 
however, one character which separates the two collections of P. 
Stephensi from all of the many collections of P. Clevelandi; this is the 
lack of bearding on the sterile filament. Though the corollas of 
the two forms are alike in size, color, and shape, the sterile filament 
in P. Stephensi is absolutely bald, while it is densely bearded in 
P. Clevelandi. Appreciating, therefore, that we are concerned 
here only with a unit-difference, we feel that P. Stephensi is noth- 
ing but a geographic race of P. Clevelandi and, because of it, worthy 
only of a subordinate rank. 
PENSTEMON PALMERI Gray 
Penstemon Palmeri Gray, Proc. Am. Acad. 7: 379. 1868. 
We found this species to be the most common and most 
spectacular penstemon in the Providence Mountains, M, J & H. 
4276. About the Bonanza King Mine it was common about the 
foot of the mountains and especially so in small draws, where it 
grew in large colonies. This being our first acquaintance in the 
