1916] NELSON & MACBRIDE—WESTERN PLANTS 147 
heretofore only in the red-flowered group, some of hich have the 
anther cell saccate at base and some at apex. It is interesting, 
therefore, to find two more very distinct species having this unusual 
anther structure. It is of further interest that, so far, all the species 
of the section or subsection are from Idaho and have been evolved 
under similar environments. 
The three species may be discriminated as follows: 
Herbage more or less puberulent; corolla large (3-4 cm. long); sterile 
Dracment walrus. or Realy OO. 6s Sis i ves ee oi S vex 
Herbage glabrous; sterile filament bearded 
Flowers about 12 mm. long, in a dense slender thyrse...... P. minidokanus 
Flowers about 18 mm. long, few, subsessile in axils of linear bracts 
P. payetensis 
Pentstemon minidokanus, n. sp.—Glabrous throughout, pale: 
stems slender, 3-5 dm. high: basal leaves narrowly oblanceolate; 
stem leaves linear-oblong, passing into linear-lanceolate upward: 
flowers in a long narrow more or less drooping thyrse, deep blue, 
small for the P. rex section: corolla only 12-15 mm. long, gradually 
dilated, glabrous within and without: sepals ovate, acute, purplish, 
about 3 mm. long: anthers cells rather short and thick, not expla- 
nate, dehiscent from the base to a closed saccate apical portion of 
about one-fourth their length; sterile filament moderately bearded 
at the apex. 
ased on specimens secured in the Minidoka, Idaho, National Forest, ee 
Geo. D. Crockett of the Forest Service, July 17, 1913 (type in Rocky Mt. Herb.). 
Pentstemon payetensis, n. sp.—Glabrous throughout, 3-5 dm. 
high: leaves rather few and remote; the basal lance-oblong, 
4-6 cm. long, on slender petioles more than half as long; the cauline 
,oblong, acuminate, passing into the linear bracts: flowers few, sub- 
sessile in the subsessile axillary cymes: sepals 6-9 mm. long, the 
very slender acumination about twice as long as the ovate oblong 
body: corolla blue, 20 mm. or less long, its tube about half as long 
as the moderately dilated limb, glabrous: anther cells as in the 
preceding; sterile filament scarcely dilated, sparsely bearded toward 
the apex with strongly refracted hairs. 
Communicated to the Racky Mt. Herb. by G. B. Mains, Supervisor of the 
Payette National Forest, being no. D-73 of the collection in the Supervisor’s 
office at Payette; type in Rocky Mt. Herb. bearing accession no. 72941. 
