330 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Sterile — relatively slender, scarcely or not lobed at the apex, 
ear the apex with yellow hairs; corolla 23 to 30 (-33) mm. 
long, amas decidedly pubescent within; sepals with an acuminate 
tip nearly equaling or exceeding the body; stem ae or puberu- 
lent us, 
Sterile filament relatively stout, frequently or spa acon at the apex, 
glabrous (rarely with a few hairs at apex); corolla 30 to 40 mm. long, 
slightly pubescent or glabrous within; ailiea ae an acuminate tip 
shorter than the body; stem puberulent.......... 29. P. brandegei. 
Corolla 15 to 25 (-30) mm. long, the throat inflated anteriorly and not narrowed 
to the orifice, the anterior lobes spreading and glabrous at the base within; 
sepals minutely and usually obscurely glandular-puberulent externally. 
Corolla widening from a narrow basal tube; sepals ovate, with acuminate tip; 
plants 30 to 100 cm. tall. 
Corolla 15 to 22 mm. long, the posterior lobes united less than one-half their 
length; sepals with a long acuminate tip. .--..-.. 30. P. saxosorum. 
Corolla (20-) 22 to 30 mm. long, the posterior lobes united over one-half 
their length; sepals with a short acuminate tip....81. P. subglaber. 
Corolla gradually widening from a broad basal tube; ee gnc ovate, 
acute; plants 10 to 20 cm. tall uintahensis. 
Anther sacs opening partially. 
Corolla 27 to 30 mm. long, the throat slightly narrowed to the orifice; mg 
broadly ovate to orbicular, with broad scarious denticulate margin and 
short acuminate tip; thyrsus strongly secund; stem leaves lanceolate, 
narrowed to slightly rounded at the base........-.-- 33. P. cyaneus. 
Corolla 20 to 30 mm. long, the throat not narrowed to the orifice; sepals lanceo- 
late to ovate, with no or moderate scarious margin, acuminate-attenuate; 
thyrsus not strongly secund; stem leaves with a broader rounded base. 
. Corolla 20 to 25 mm. long; sepals attenuate-tipped, not or scarcely scar’ous- 
ed. 
margin 
Stem leaves ovate, the largest 2 to 6 cm. wide; stem glabrous throughout 
or puberulent only near the base; capsules 9 to 12 mm. long. 
34, P. cyananthus. 
Stem leaves lanceolate, the largest mostly 1 to 1.5 em. wide; stem more 
puberulent, frequently so nearly throughout; capsules 8 to 10 mm. 
RBS os Sos 34a. P. cyananthus mp 
Corolla 5 var to 30 mm. long; sepals rps ae i pions scarious-margine 
glabrous or puberulent.. . ik ee b. P. cyananthus lo ngiflorus. 
in P. strictus); =~ Powe strict, secund; pedicels relatively short; herbag 
brighter green, rarely glaucous. 
Anther sacs lanate-pubescent with slender hairs, these shorter than or about 
equaling the width of the sac 
Anther sacs _—s partially; pedicels and sepals somewhat glandular 
puberulen 
Leaves bial the cauline ones narrowly so, mostly scusninnte, 2 
largest 6 to 10 cm. long; sepals with broad scarious margin, 
to an attentuate tip; corolla 20 to 30 mm. long.! 
Se cicada ae 
‘For oe of a related new species, Penstemon mensarum, omitted in the 
key, see p. 380. 
