346 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
Empire, Patterson 258 (A, F, M, P, Y); Georgetown (Y); Idaho Springs (Y) 
Costilla: Sangre de Cristo Creek, Rydberg & Vreeland 5631 (Y). Denver: Val- 
verde, Pennell 5846 (Y). Douglas: H. S. Smith 5136 (Y); Elbert: Bijou Basin, 
Jones 155 (F). El Paso: Colorado Springs, Shear 4789 (U, Y); Garden of the 
Gods; Manitou (M, P, Y); Palmer Lake; South Cheyenne Canyon; Ute Pass 
(M). Fremont: Wilson Creek, Brandegee 419 (M). Gilpin: Central City (Y); 
Eldora to Baltimore, Tweedy 5714A (Y). Lake: Twin Lakes, C. W. Derry (F). 
Larimer: Dale Creek; Estes Park (M, U); Fort Collins, Crandall 1866 (Y); 
Laporte (Y); Pennocks (Y); Poudre Canyon (Y). Las Animas: Stonewall, 
Beckwith 157 (Y), 164 (Y); Trinidad (Y). Park: Como, Shear 4586 (Y); Webster 
Canyon (M). Teller: Florissant, Ramaley 1313 (B). Weld: Evans (Y); Windsor, 
Pennell 5863 (P, 8, U, Y). 
23. Penstemon magnus Pennell, sp. nov. 
Stems several, 40 cm. tall, from a caudex, stout, glabrous, bluish glaucous; leaves 
light green, scarcely glabrous, obscurely veined, glabrous, those at the base of the 
stem with oblanceolate, obtusish to obtuse blades 7 to 8 cm. long, narrowed into 
scarcely defined petioles (bases of lowest leaves not meeting around stem), the largest 
leaves 12 cm. long and 1.4 cm. wide; thyrsus narrowly elongate, one-half the height of 
the plant, composed of 7 or 8 fascicles, each consisting of 2 short axillary branches, 
the pedicels equaling the peduncle; sepals 6 to 7 mm. long, narrowly ovate, acumi- 
nate, obscurely and finely ribbed, with white to pinkish, scarious, denticulate mar- 
gin, glabrous; corolla about 25 to 27 mm. long, the tube and throat about 18 to 20 
mm. long, the throat strongly inflated and rounded ventrally, the 2 posterior lobes 
about 6 to 7 mm. long, united and arched about one-half their length, the 3 anterior 
lobes slightly longer, united at base, the free portions widely spreading; corolla 
glabrous without and within, probably deep blue (not seen fresh); anther sacs divari- 
cate, 2.3 to 2.5 mm. long, oblong, distinct, opening from the distal apex nearly 
throughout, glabrous (except for minute ciliation of suture); sterile filament shorter 
than the anterior pair, scarcely enlarged and slightly flattened distally, bearded on 
the posterior face distally with a few short yellow hairs; capsule 15 to 20 mm. long, 
ovate, acuminate, glabrous; seeds 3 to 4 mm. long, irregularly rectangular in outline, 
curved, the angles sharp, not winged, the surface very minutely alveolate-reticu- 
late, dark brown, slightly glistening. 
Type in the herbarium of the New York Botanical Garden, collected in low, open 
grounds, near Teller (North Park), Jackson County, Colorado, altitude 2,400 meters, 
in flower, July 30, 1884, by C. S. Sheldon (no. 90; distributed as P. confertus caeruleo- 
purpureus A. Gray). 
Probably Montane Zone. 
24. Penstemon leiophyllus Pennell, sp. nov. 
Stems one or several, 15 to 60 cm. tall, from a short branched caudex, glabrous, 
glandular-puberulent in the inflorescence, slightly glaucous; leaves dull pale green, 
slightly glaucous, finely veined, acute, altogether 10 to 13 cm. long, 1.3 to 2. cm. wide, 
narrowed into petiole-like bases of about one-third the total length, the leaves of the 
stem smaller, clasping from a broadly rounded base (bases of opposite leaves meeting 
around stem), becoming reduced to small bracts through the inflorescence; thyrsus 
narrow, secund, less than one-half the height of the plant, composed of 5 to 15 fas- 
cicles, each consisting of 2 short axillary branches, their pedicels somewhat exceed- 
ing the peduncle; sepals 6 to 7 mm. long, lanceolate, acuminate, not veined, with 
obscure or no scarious margin, entire, glandular-puberulent; corolla 25 to 30 mm. 
long, the tube and throat 17 to 20 mm. long, the throat decidedly inflated and rounded 
ventrally, the 2 posterior lobes 8 to 10 mm. long, united and arched about two-thirds 
their length, projecting, the 3 anterior lobes equaling or exceeding the posterior 
