PENTSTEMON SCROPHULARIACE 513 
P. attenuatus Dougl. Lindl. Bot. Reg. t. 1295. Stems strict, 1-2 feet 
high; the summit and inflorescence pubescent and viscid: lower leaves 
narrowly oblong or ovate to lanceolate, the blade 6-18 lines long, on peti- 
oles as long or longer; the upper linear to ovate-lanceolate, sessile: thyrsus 
spiciform, interrupted, the peduncles and pedicels short: sepals ovate or 
oblong-lanceolate, acute or acuminate, 2-3 lines long, narrowly scarious- 
margined: corolla narrowly funnelform, 8-1 lines long, blue, ochroleucous 
ve ean sterile filament bearded at the apex. Interior of Oregon to 
aho. . 
P. econfertus Dougl. Lindl. Bot. Reg. t. 1260. Glabrous throughout 
or the inflorescence sometimes pubescent or puberulent: stems slender, 
6-20 inches high: lower leaves narrow-lanceolate, attenuate below to nar- 
row petioles, including the petiole 1-2 inches long, mostly entire; the 
middle cauline largest, lanceolate, sessile by a broad base: thyrsus spici- 
form, interrupted, of 2-5 verticilastriform dense .many-flowered clusters: 
pedicels very short: sepals from oblong-lanceolate to broadly ovate, acute 
or acuminate, with broad scarious margins commonly erose or lacerate : 
corolla very narrow, 4-6 lines long, yellow, lower lip conspicuously bearded 
within: sterile filament shorter than the others, dilated at the summit: 
capsule acuminate-ovoid, longer than the calyx. Prairies of eastern 
Oregon to Brit. Columbia and the Rocky Mountains. 
Var. globosus Piper Bull. Torr. Club xxvii, 397. Inflorescence a 
dense head-like panicle of many short-pedicelled flowers, rarely with a 
second verticillate cluster below: corolla intense blue, nearly an inch long. 
Wallowa Mountains, eastern Oregon. 5 
P. procerus Dougl. ex Graham in Edinb. Phil. Jour. 1829. i, 
confertus var. ceruleo-purpureus Gray. Glabrous throughout: stems slen- 
der, 2-12 inches high: leaves lanceolate, the lower ones petioled, 1-2 inches 
long, those of the middle of the stem largest, all usually entire: flowers in 
about 2 dense verticillate clusters: sepals oblong or spatulate, with broad 
scarious erose margins, abruptly acuminate or 3-toothed at the apex, about 
2lines long: corolla bright blue and violet, about 8 lines long, tubular- 
funnelform, the lower lip bearded within: sterile filament as long as,the | 
others: and bearded at the apex. On high mountains and plains, Brit. 
Columbia to California and the Rocky Mountains. 
P. pulchellus Greene Pitt. iii, 310. Green and glabrous throughout: 
flowering stems slender, from a much branched woody base with numer- 
ous short sterile branches, 2-6 inches high: leaves coriaceous, entire, the 
lowest from ovate to oblanceolate, 6-12 lines long including the slender 
petiole; those of the stem 2-3 pairs, oblong or lanceolate-oblong, sessile: 
thyrsus short and interrupted : flowers numerous, on very short pedice,s: 
sepals obovate, abruptly acute, with scarious more or less erose margins: 
corolla bright blue to purple, about 6 lines long, with narrow throat and 
abruptly spreading limb, the throat sparsely hairy inside. On alpine 
summits of the Cascade and Blue Mountains of Oregon and Washington. 
P. paniculatus. Glabrous throughout: stems stout, very numerous, 
shrubby below, forming loose bushy clumps, 1-2 feet high: leaves linear- 
lanceolate, entire or sparsely dentate, all nearly alike, 1-2 inches long, 
2-6 lines wide, only the uppermost ones sessile: flowers very numerous, 
in open thyrsoid leafy panicles: pedicels short: sepals ovate or oblong to 
lanceolate, acute or acuminate, with narrow scarious margins, 3-4 lines 
long: corolla ochroleucous, 5-6 lines long, tubular, the limb scarcely spread- 
ing, puberulent outside, the lower lip bearded within: sterile filament 
longer than the others, bearded at the apex. On the high ridge between 
the Klickitat Valley and the Columbia river, opposite The Dalles Oregon. 
P. humilis Nutt. Gray Proc, Am. Acad. vi, 69. Minutely puberulent 
