358 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
43a. Penstemon secundiflorus lavendulus Pennell, subsp. nov. 
Stems 20 to 40 cm. tall, relatively slender; basal leaves lanceolate; stem Jeaves 
‘more or less narrowly lanceolate, acuminate from a not conspicuously widened base; 
inflorescence one-half the height of the plant; sepals about 4 mm. long, ovate, acute 
to acuminate, with scarious, white to pink margins; corolla smaller and narrower than 
in the species, 15 to 20 mm. long, a paler lavender-pink to lavender-blue; capsule not 
seen. Otherwise nearly as in the species. 
Type in the herbarium of the New York Botanical Garden, collected on bluff of 
Baculite Mesa, altitude 1,530 meters, six miles northeast of Pueblo, Pueblo County, 
Colorado, in flower, June 7, 1915, by F. W. Pennell (no. 5739). Isotypes in U. 8. 
National Herbarium, herbarium of Missouri Botanical Garden, Gray Herbarium, and 
Rocky Mountain Herbarium. 
Upper Sonoran Zone. 
44. Penstemon osterhoutii Pennell, sp. nov. 
Stems one to several, 40 to 80 cm. tall, from a short branched caudex, glabrous, 
slightly pale or bluish glaucous; leaves thickened, greenish, slightly glaucous, evi- 
dently reticulate-veined, glabrous, those at the base of the stem with ovate acute 
blades 7 to 9 cm. long, narrowed into margined petioles 3 to 5 cm. long, those of the 
stem clasping (bases of opposite leaves meeting around stem), lanceolate-ovate to 
ovate, acuminate from a widened base, the largest mostly 6 to 9 cm. long, 3 to 4 em. 
wide; thyrsus narrowly elongate, nearly one-half (or more) the height of the plant, 
composed of 5 to 10 fascicles, each consisting of 2 short axillary branches, their pedicels 
shorter or longer than the peduncle; sepals 7 to 8 mm. long, ovate, acuminate, fine- 
ribbed, with broad, white to pink, scaricus maigin, glabrous; corolla 20 mm. long, 
the tube and throat 13 mm. long, the throat inflated and rounded ventrally, the 2 
posterior lobes 7 mm. long, united and arched one-third to nearly one-half their 
length, the 3 anterior slightly longer, 7 mm. wide, united about two-fifths their length, 
all the free portions widely spreading; corolla externally glabrous, within lanate- 
pubescent over the base of the anterior lobes, glabrous elsewhere, blue or bluish (not 
seen fresh); anther sacs widely divaricate (explanate), 1 to 1.2 mm. long, oblong, dis- 
tinct, with short line of contact, opening throughout, the suture glabrous; sterile fila- 
ment 14 to 15 mm. long, slightly exserted, flat, much enlarged distally, recurved at 
apex, very densely bearded on the posterior face distally with golden-yellow hairs; 
capsule 10 to 13 mm. long, ovate, acuminate, glabrous, pale brown; seeds 3 to 4 mm, 
long, irregularly lanceolate-curved in outline, the angles sharp, semiwinged, the 
surface alveolate-reticulate, cinnamon-brown, glistening. 
Type in the herbarium of the New York Botanical Garden, collected at Glenwood 
Springs, Garfield County, Colorado, in flower, May 24,1911, by G. E. Osterhout (no. 
4575). 
Loamy sagebrush slopes, at altitudes of 1,700 to 2,100 meters. Submontane Zone; 
flowering from late May to late June. Valley of Grand River in Eagle and Garfield - 
counties, Colorado. 
CoLorabo: Eagle: State Bridge, Osterhout 4213. Garfield: Glenwood Springs, 
Osterhout 4575 (Y), 4702 (Y), Pennell 6158 (A, D, F, TH, M, R, 8, U, Y), 6165 (F, 
Y), 6170 (B, K, P, Y), 6172 (Y). 
45. Penstemon versicolor Pennell, sp. nov. 
Stems several, 20 to 35 cm. tall, from a short branched caudex, glabrous, bluish 
glaucous; leaves thickened, dull green, glaucous, obscurely reticulate-veined, gla- 
brous, those at the base of the stem with obovate acutish blades 3 to 4 cm. long, nar- 
rowed into scarcely defined petioles (less than 1 cm. long), those of the stem cordate- 
clasping (opposite leaves meeting), ovate, acute, from a cordate base, the largest 
