RHINANTHACEAE 1061 
blades ; upper stem-leaves few, the blades oblong, lanceolate or linear-lanceolate, rather 
remotely toothed, partly clasping: panicles narrow: calyx-lobes ovate, becoming triangu- 
lar, acute, closely puberulent or pubescent during anthesis: corolla white or purplish, 
2-2.5 em. long; tube rather gradually dilated, the throat sparingly bearded: staminodium 
bearded with very short hairs: capsules ovoid with a flat base, 5-6 mm. long, much surpass- 
ing the calyx. 
In sandy;soil or swamps, New York to Missouri, Georgia and the Indian Territory. Spring. 
10. Pentstemon multiflórus Chapm. Stems merely puberulent below the inflores- 
cence, 4-12 dm. tall. Basal and lower stem-leaves with spatulate or oblong blades nar- 
rowed into petiole-like bases; upper stem-leaves few; blades narrowly oblong to oblong- 
lanceolate, obtuse, entire or undulately toothed, manifestly decurrent on the stem : panicle 
often ample and many-flowered : calyx-lobes glandular-pubescent, ovate, 3-4 mm. long, 
obtuse : corolla white, about 1.5 em. long, glabrous or nearly so in the throat : staminodium 
sparingly bearded near the tip or nearly glabrous: capsules conic, 8-10 mm. long, rather 
narrow at the base, abruptly constricted at the apex, usually fully twice as long as the calyx. 
In pine lands, Florida. Spring and summer. 
11. Pentstemon Mackayànus Knowles & Westc. Stems minutely puberulent. 
Leaves bright green ; blades various, those of the basal and lower stem-leaves lanceolate or 
ovate to oblong ; those of the upper stem-leaves lanceolate or broadly lanceolate, acute or 
somewhat acuminate, irregularly serrate, partly clasping by the dilated bases : panicle open : 
calyx-lobes ovate to oblong-ovate, merely acuminate, 4-5 mm. long, sparingly pubescent : 
corolla purple without, 1.5-2 cm. long; tube funnelform, sparingly bearded in the throat : 
staminodium rather copiously bearded : capsules not seen. 
In open woods, Texas. Spring. 
12. Pentstemon Smállii Heller. Stems puberulent below the inflorescence, 3-12 
dm. tall. Basal leaves with ovate or oval coarsely toothed blades abruptly narrowed into 
margined petioles; upper stem-leaves few ; blades lanceolate to ovate-lanceolate, succes- 
sively broader at the base, 8-15 cm. long, often acuminate, regularly and rather finely 
toothed, clasping: panicle secund : calyx-lobes lanceolate or oblong-lanceolate, 5-6 mm. 
long, acute or acuminate: corolla showy, pink-purple, striped with white especially within, 
2.5-3 cm. long; tube abruptly dilated near the middle, with long yellow hairs in the 
throat: staminodium bearded to the base: capsules ovoid, 8-10 mm. long, often twice as 
long as the calyx. 
On mountain slopes and river bluffs, North Carolina and Tennessee. Spring. 
13. Pentstemon ténuis Small. Stems 4-6 dm. tall, puberulent. Stem leaves oppo- 
site; blades oblong to oblong-lanceolate or ovate, 6-10 cm. long, acute or acuminate, 
sharply serrate-dentate, partly clasping : panicles open, rather few-flowered : calyx-lobes 
minutely glandular-pubescent, 4-5 mm. long, becoming 7 mm. at maturity, lanceolate, with 
attenuate spreading or recurving tips: corolla purplish, barely 1.5 cm. long, glandular ; 
tube hardly dilated, but with a slight gibbosity near the middle: sterile filament bearded 
above the middle: capsules broadly ovoid, about 5 mm. high, surpassed by the calyx. 
In woods and thickets, Alabama and Louisiana. Spring. 
14. Pentstemon álbidus Nutt. Foliage dark green, puberulent or somewhat ca- 
nescentabove, viscid. Stemstufted, 1-3 dm. tall: basal and lower stem-leaves with oblong 
or spatulate blades; upper stem-leaves lanceolate, sometimes narrowly so, not lustrous, 
entire or shallowly toothed, sessile: panicle raceme-like, the main branches more or less 
suppressed, the cymes clustered: calyx-lobes lanceolate, 6-8 mm. long, densely viscid- 
pubescent : corolla white or purple-tinged, about 1.5 cm. long, the lips spreading: stami- 
nodium bearded : capsules ovoid, about 10 mm. long, smooth. 
On sand hills or plains, Assiniboia to Kansas, Texas and Colorado. Spring and summer. 
15. Pentstemon Guadalupénsis Heller. Foliage bright green. Stems tufted, 1-4 
dm. tall, puberulent: basal and lower stem-leaves with linear or nearly linear often elon- 
pc blades ; upper stem-leaves numerous, approximate ; blades linear-lanceolate to lanceo- 
ate, 2-6 cm. long, entire or nearly so, lustrous, sessile: panicle raceme-like, viscid-pubes- 
cent: calyx-lobes lanceolate or ovate-lanceolate, 5-7 mm. long: corolla white or tinged 
with purple, about 1.5 em. long, sparingly glandular-pubescent: staminodium bearded to 
about the middle: capsules ovoid, about 10 mm. long, veiny. 
In stony soil, central Texas. Spring. 
16. Pentstemon trifldrus Heller. Glabrous or nearly so to the inflorescence. Stems 
3-9 dm. tall: basal and lower stem-leaves with spatulate or oblong almost entire blades 
narrowed into margined petioles; upper stem-leaves oblong to ovate, mostly acute, 3-10 
cm. long, successively more sharply and deeply toothed, partly clasping : peduncles usually 
