482 RyYDBERG: STUDIES ON THE RocKy MOUNTAIN FLORA 
Monarda Nutiallu A. Nels. or M. citriodora of Coulter’s Manual 
is Monarda pectinata Nutt. 
Salvia Columbariae Benth. has been collected in Utah. 
SCROPHULARIACEAE 
Miss Eastwood has called to my attention that Pentstemon 
acuminatus, P. humilis Nutt., and P. glaucus Graham have been 
misinterpreted. P. acuminatus is a species confined to the 
Columbia Valley, has a more ample corolla, perfectly glabrous 
within; the tongue of the sterile filament is strongly curved and 
only short-bearded at the apex. Whether the so-called P. 
acuminatus of the Rocky Mountain region is a distinct species 
or should be included in P. nitidus Dougl. is hard to tell. A 
duplicate of the type of the latter is in the Columbia University 
herbarium, but this, as well as several other specimens, does not 
have the broad, abruptly acuminate bracts, characteristic of the 
so-called P. acuminatus, but there is no other distinction and inter- 
mediate forms are not lacking. 
The original P. humilis Nutt. is, according to Miss Eastwood, 
the same as P. collinus A. Nels., which therefore passes into 
synonymy. Dr. Gray in describing P. humilis* makes Nuttall’s 
plant the type, but evidently had another plant mostly in his 
mind, viz. Parry 257 and from this we have received our usual 
idea of P. humilis. This probably should be known as P. albertinus 
Greene,} which apparently is the same. Professor Nelson gives 
P. pseudohumilis Rydb. as a synonym, but this is the same as his 
own P. Owenii. 
Pentstemon glaucus Graham does not belong to the group where 
Dr. Gray placed it and has nothing to do with the Rocky Mountain 
plant P. stenosepalus (Gray) Howell (P. glaucus stenosepalus A. - 
Gray), but belongs to the P. confertus group. It is evidently the 
same as P. pinetorum Piper or closely related to it. 
Pentstemon Macbridei A. Nels.t and P. berpulcher A. Nels. are 
apparently P. Cusickii A. Gray and P. unilateralis Rydb., respec- 
tively. A duplicate of the type of P. Cusickit is in the herbarium 
* Proc. Am. Acad. 6: 69. 1862. 
t Leaflets 1: 167. 1906. x 
t Bot. Gaz. 52: 272, 273. 1o1t. 
