GENUS 9. FIGWORT FAMILY. 
8. Pentstemon calycésus Small. Long-sepaled 
Beard-tongue. Fig. 3762. 
si as calycosus Small, Bull. Torr. Club 25: 470, 
1808. 
Glabrous except a few scattered hairs in the in- 
florescence and lines of puberulence on the inter- 
nodes, deep green. Leaves various, the basal spatulate, 
2'-0’ long, entire or undulate, with winged petioles; 
lower stem-leaves similar to the basal, the upper lan- 
ceolate or ovate-lanceolate, acute or acuminate, finely 
repand or distinctly serrate, rounded at the base and 
clasping; calyx-segments with a lanceolate base and 
a slender tip, often becoming 5” long; corolla purple, 
12”-15” long; sterile filament sparingly bearded. 
On bluffs, Kentucky to Missouri, Alabama and Arkan- 
sas. May-June. 
1o. Pentstemon tubiflérus Nutt. 
g. Pentstemon gracilis Nutt. Slender 
Beard-tongue. Fig. 3763. 
Pentstemon gracilis Nutt. Gen. 2: 52. 1818. 
Glabrous or very nearly so up to the glandular- 
pubescent inflorescence; stem slender, strict, 6-18’ | 
high. Basal and lower leaves linear-oblong or 
spatulate, mostly obtuse, denticulate, or entire, 
1-3’ long, narrowed into margined petioles; upper 
leaves sessile, linear-lanceolate or the uppermost 
lanceolate, acuminate, denticulate; thyrsus open, 
several-many-flowered; pedicels 2”-4” long; ca- 
lyx-segments lanceolate, acute or acuminate; co- 
rolla purple, 9-12” long, its tube gradually en- 
larged above, its throat wide open; sterile filament 
bearded for about one-half its length; capsule one- 
third longer than the calyx. 
On moist prairies, Manitoba to Minnesota, Mis- 
souri, Athabasca, Oklahoma and Colorado. May-July. 
Funnel- 
form Beard-tongue. Fig. 3764. 
Pentstemon tubiflorus Nutt. Trans. Am. Phil. Soc. 
CII.) 5: 181. 1833-37. 
Glabrous, except the viscid-pubescent calyx and 
pedicels; stem slender, strict, 2°-33° high, leafless 
above. Leaves oblong, ovate, or lanceolate, 1-4’ 
long, obtusish or acute, the basal narrowed into 
broad margined petioles, the upper sessile or clasp- 
ing, entire or merely undulate; thyrsus narrow, 
‘interrupted, the clusters several-flowered; pedicels 
1-3” long, calyx-segments ovate, acuminate, short, 
striate-nerved; corolla nearly funnelform, white 
or purplish, less than 1’ long, nearly as broad 
when expanded, its tube gradually enlarged, the 
limb nearly equally five-lobed, the lobes spread- 
ing; sterile filament short bearded above; capsule 
ovoid, acute, about twice as long as the calyx. 
In moist soil, Missouri, Kansas and Arkansas. 
May-July. 
