CHELONEX. 
brous; leaves quite entire: radical ones spatulate: cauline ones 
lanceolate, sub-undulated, sessile; flowers verticillately pani- 
cled; lobes of corolla nearly equal; sterile filament quite 
glabrous. 2t. H. Native of North-West America, on the 
banks of the Spokan river. Douglas, D. Don, in Sweet, fl. 
gard. n. s. t. 259. — Calycine segments equal, sub-imbricate. 
Flowers very showy, in axillary, many-flowered cymes, the 
whole forming a pyramidal panicle. Corolla sky blue, varying 
to red, about an inch long. 
Showy Pentstemon. FI. June, Sept. Clt. 1827. Pl. 2 to 
3 feet. 
6 P. AcuuINA' TUM (Dougl. in bot. reg. t. 1985.) ascending, 
glabrous, and very glaucous; radical leaves ovate-oblong, on 
long petioles, quite entire, rather coriaceous: cauline leaves and 
bracteas cordate, acuminated, sessile, stem-clasping ; fascicles of 
flowers on short peduncles ; calycine segments acuminated, quite 
glabrous; corolla with a funnel-shaped tube, and an inflated 
throat; segments of the limb broad, retuse. X.H. Native 
of North-West America, in barren, sandy plains on the Colum- 
bia river. Corollas purple, bordered with lively blue, rivalling 
those of P. specidsum. Radical leaves tufted. Sterile filament 
shorter than the tube of the corolla, pilose, and hooked at top. 
Acuminated-leaved Pentstemon. Fl. June, Sept. Clt. 1827. 
Pl. 1 to 11 foot. 
7 P. vu'mitum (Nutt. in journ. acad. nat. sc. phil. vol. 7. p. 
46.) puberulous, rather tufted; leaves lanceolate-linear, acute, 
entire; stems very short, few-flowered ; flowers rather large, 
glabrous; calycine segments lanceolate, acuminated; sterile 
filament bearded at top. 2/. H. Native near the sources of 
the Columbia river, on the borders of the little Goddin river. 
dont large. Stem not more than 3-4 inches high. Flowers 
arge. 
Dwarf Pentstemon. Pt. 1 to 1 foot. 
8 P. Cosæ`a (Nutt. journ. acad. nat. sc. phil. 7. p. 182.) 
clothed with glandular pubescence ; leaves sharply serrulated, 
shining: radical ones lanceolate, petiolate : cauline ones ovate : 
ultimate ones half stem-clasping; throat of corolla inflated, 
naked ; calycine segments ovate ; sterile filament bearded. 2%. 
H. Native of North America, in the sterile and denudated 
portions of the prairies of Red River, in calcareous soil; and of 
the interior of Texas. D. Don, in Sweet, fl. gard. n. s. t. 348. 
Hook. bot. mag. t. 3465.  Peduncles 3-5-flowered, the whole 
forming a terminal panicle. Leaves broadish, and thick. Calyx 
clothed with viscid down. Corolla large, pale purple, marked 
more or less with red streaks. 
Cobca-flowered Pentstemon. Fl. May, Sept. Clt. 1835. 
Pl. 2 to 3 feet. 
9 P. prerra is (Nutt. in amer. phil. trans. n. s. vol. 5. p. 
181.) quite glabrous ; cauline leaves lanceolate, acuminated, re- 
pandly denticulated ; calyx clammy, with acuminated reflexed 
segments ; corolla large, subcampanulate; sterile filament beard- 
edattop. %4. H. Native of the Arkansas, in wet woods and 
prairies common. Sweet, fl. gard. t. 120. Said to be allied to 
P. campanulàtum. Leaves broad. Panicle naked. Ultimate 
branches and calyxes clothed with viscid down. Corolla pure 
white, and downy; the tube exserted ; orifice inflated, subcam- 
panulate, and terete; the upper lip a little shorter than the 
lower, and coarctate : the lower one 3-lobed and dilated. 
Foxglove-flowered Pentstemon. Fl. June, Sept. Clt. 1824. 
Pl. 11 to 2 feet. 
$ 3. Flowers appearing as if they were verticillate. Corolla 
bilabiate. 
10 P. runIrLÓRuM (Nutt. in amer. phil. trans. n. s. vol. 5. p. 
181.) leaves ovate, connate, denticulated, glabrous; stem tall, 
nearly naked; calyx and corolla clothed with clammy down ; 
I. Pentstemon. 637 
calycine segments ovate; corolla tube-formed: limb villous 
inside; sterile filament bearded. 21. H. Native of the Arkansas, 
in wettish prairies from Fort Smith to Red river. Radical 
leaves elliptic-oblong, entire, and smooth : cauline ones sinuated 
towards the base of the stem: lower ones oblong-ovate. The 
cauline leaves are so small and remote as to give the stem the 
appearance of being naked. Corollas pure white; the whole 
orifice and tube villous. "This is a very beautiful species, with 
the flowers rather small and crowded, as if it were in verticillate 
clusters. 
Tube-flowered Pentstemon. PI. 2 to 3 feet. 
11 P. ova‘rum (Dougl. in. bot. mag. 2903.) flowers, stems, 
and peduncles, clothed with glandular hairs ; leaves ovate-cor- 
date, stem-clasping, glabrous, coarsely toothed: lower ones on 
long petioles; peduncles axillary, subcorymbose: upper ones 
short, and appearing as if they were verticillate; corolla tubu- 
lar ; sterile filament bearded at top, and unidentate at the base. 
u.H. Native of North-west America, among limestone rocks 
on the high mountains about the grand rapids of the Columbia. 
D. Don, in Sweet, fl. gard. n. s. t. 211. Stem tetragonal up- 
wards. Radical leaves on long petioles. Calyx glandular. 
Corollas of a brilliant purple blue, glandular externally. 
Ovate-leaved Pentstemon. | Fl. June, Sept. Clt. 1826. PI. 
4 feet. 
12 P. procerum (Dougl. mss. Graham, in edinb. phil. journ. 
july, 1829. Hook. bot. mag. 2954.) stem erect, nearly simple ; 
leaves lanceolate, quite entire: lower ones petiolate: superior 
ones sessile, subconnate ; flowers verticillately spicate ; whorles 
distant; segments membranaceously jagged; sterile filament 
toothless, bearded on the upper side at the top. 2/. H. Na- 
tive of North-west America, and the Rocky Mountains. 
Douglas, Drummond, and Dr. Richardson. Plant glabrous. 
Flowers in crowded, opposite racemes, from the upper and 
smaller leaves, and standing so close to the stem that they 
seem verticillate. Corolla small, of a rich veined purple, gla- 
brous. 
Tall Pentstemon. Fl. July, Sept. Clt. 1827. Pl.1 to 2 feet. 
13 P. conre’rtum (Dougl. in. bot. reg. 1260.) leaves quite 
entire, glabrous: radical ones spatulate, acuminated, on long 
petioles : superior one sessile, ovate, acuminated ; peduncles 
axillary, short, bearing each a cyme of crowded flowers, which 
appear verticillate; upper floral leaves reduced to jagged or 
serrated bracteas ; calycine segments acute, mucronate, jagged 
or serrated ; corolla a little longer than the calyx; sterile fila- 
ment bearded. yw. H. Native of North-west America, in 
open places of mountainous pine forests, in dry sandy soils be- 
tween the Salmon river and the Kettle falls on the Columbia 
river ; also in the valleys of the Rocky Mountains. Stem ascend- 
ing. Cauline leaves and bracteas under the peduncles, some- 
what stem-clasping. Corolla tubular, subventricose, pale cream- 
coloured, glabrous. 
Cromded-flowered Pentstemon. Fl. June, Sept. Clt. 1827. 
Pl. 1 to 2 feet. 
14 P. micra’nrnum (Nutt. in journ. acad. nat. sc. phil. vol. 
7. p. 45.) smooth ; leaves linear-lanceolate, acute, half stem- 
clasping, quite entire; flowers small, glomerate ; interruptedly 
and spicately panicled ; corolla rather tubular, bearded inside ; 
sterile filament minute, hardly bearded; calycine segments lan- 
ceolate, acute. 2/. H. Native of North America, among the 
Rocky Mountains, in the valleys near the sources of the Colum- 
bia. Stems slender. Flowers purple, very small, collected 
into about 3-4 clusters. Corolla tubular, a little curved, with 
an almost regular, 5-lobed border. 
Small-flowered Pentstemon. PI. 1 to 13 foot. 
15 P. pruindsum (Dougl. in bot. reg. t. 1280.) leaves grey: 
radical ones petiolate, entire,or toothed : cauline leaves tooth- 
