PENNELL—SCROPHULARIACEAE OF THE ROCKY MOUNTAINS. 381 
Sepals 8 to 9 mm. long, the margin finely denticulate distally and with 
an acuminate-attentuate tip, this nearly or quite equaling the 
sepal body; corolla 30 mm. long, the posterior lobes projecting; 
leaves lanceolate, the widest 0.9 to 1.1 cm. wide..85. P. scariosus. 
Sepals 4 to 6 mm. long, the margin coarsely denticulate distally and 
with an acuminate tip, this much shorter than the sepal body; 
corolla 20 mm. long, the posterior lobes apparently more spreading; 
leaves linear-lanceolate, the widest 0.7 to 0.9 cm. wide. 
36. P. garrettii. 
Leaves ovate to lanceolate, the cauline ones lanceolate, obtuse to acute, 
the largest ones 3 to 7 cm. long; sepals with obscure narrow scarious 
margin, acute; corolla 15 to 20 mm. long.....-... 37. P. cyanocaulis. 
Anther sacs opening throughout; pedicels and sepals glabrous. Corolla 15 
mm. long; plant 10 cm. tall............-....--.---- .....38. P. caryi. 
Anther sacs lanate with tortuous hairs, these mostly much exceeding the width 
of the sac. 
Sepals 7 to 10 mm. long, long-acuminate, with broad conspicuous scarious 
margin, slightly puberulent; corolla more widely expanded. 
39. P. strictiformis. 
Sepals 3 to 5 mm. long, obtuse to acute (or short-acuminate), with narrow 
scarious margin, glabrous; corolla less widely expanded. 
Basal leaves and stem (throughout) nearly or quite glabrous, usually not 
or but slightly glaucous; leaves mostly lanceolate, those of the stem 
frequently narrower..........-.-220++-0---2ee2 00s 40. P. strictus. 
Basal leaves and stem (at base or frequently throughout) puberulent, more 
commonly glaucous; leaves narrower, the basal ones narrowly lanceo- 
late, the cauline ones linear.........-..- 40a. P. strictus angustus. 
Corolla pale blue, the throat scarcely exceeding the relatively long basal tube; 
anther sacs densely lanate with long hairs; sterile filament glabrous; thyrsus 
lax, less secund; pedicels relatively long; herbage more glaucous. 
41. P. comarrhenus. 
xX. COERULEI. 
Stamens and style included; anther sacs explanate. 
Corolla 40 to 45 mm. long, glabrous within, the lobes slightly spreading; sterile 
filament closely short-bearded near the apex; capsule 20 to 25 mm. long, con- 
spicuously acuminate........ a .-42. P. grandiflorus. 
Corolla 10 to 25 mm. long, the lobes strongly spreading; sterile filament strongly 
bearded toward the apex; capsule 10 to 15 mm. long, acuminate. 
Corolla 15 to 25 mm. long, lanate-pubescent within at base of the anterior lobes 
lavender-pink to lavender-blue; sterile filament very densely bearded. 
Corolla (15-) 20 to 25 mm. long; sterile filament strongly enlarged distally, 
very densely bearded with golden hairs; stem leaves ovate, the upper ones 
acuminate, all firm to somewhat fleshy. 
Sepals ovate-acuminate; sterile filament bristle-bearded to the apex; basal 
and stem leaves lanceolate to lance-ovate. 
Thyrsus strongly secund, composed of relatively lax fascicles; flowers 
lavender-pink; leaves firm, very glaucous, scarcely veined. 
Corolla 20 to 25 mm. long; stem leaves lanceolate to lance-ovate; plants 
| 43. P. secundiflorus. 
Corolla 15 to 20 mm. long; stem leaves narrower; plants smaller. 
43a. P. secundiflorus lavendulus. 
