638 
ed, sessile; superior bracteas entire ; flowers verticillate ; ca- 
lyxes and bracteas villous; corolla glabrous, twice as long as 
the calyx; segments of the limb roundish, entire. XY. H. 
Native of North-west America, near the Priest’s Rapid, on the 
Columbia river. Plant pruinose. Radical leaves tufted, downy. 
Peduncles many-flowered, short. Corollas blue, rivalling in 
brillianey those of P. speciósum. 
Pruinose Pentstemon. | Fl. June, Sept. Clt. 1827. 
14 foot. 
8 3. Corolla bilabiate. 
Pl. 1 to 
Upper lip of corolla compressed ; the 
lower plaited. 
16 P. crav'cuw (Graham, in edinb. phil. journ. 1829. p. 348. 
Lindl. bot. reg. 1286.) stem smoothish ; leaves all glabrous: 
radical ones lanceolate, petiolate, quite entire, or denticulated : 
cauline leaves and bracteas ovate-lanceolate, sessile, stem-clasp- 
ing; panicle thyrsoid ; corollas inflated, and are, as well as the 
calyxes, clothed with glandular down outside; sterile filament 
stretched out, bearded. X. H. Native of Arctic America. 
P. gràcile, Hook. bot. mag. 2945, description, but not the 
figure. Corollas bluish-purple, with a pale or whitish throat. 
Glaucous Pentstemon. Fl. June, Sept. Clt. 1827. Pl. 1 foot. 
17 P. ArrzNvA' TUM (Dougl. in bot. reg. 1295.) stem erect, 
pilose at top; radical leaves elliptic, acute, petiolate : superior 
ones ovate-oblong, stem-clasping, sessile, all quite glabrous and 
quite entire; panicle strict, and are, as well as the calyxes and 
corollas, downy; capsule glabrous; sterile filament bearded. 
4. H. Native of North-West America, on the mountains of 
Lewis and Clark’s river. Leaves dark green: radical ones 
sometimes cuneated and cuspidate. Corollas cream-coloured. 
Attenuated-leaved Pentstemon. Fl. June, Sept. Cit. 1827. 
Pl. 11 to 2 feet. 
18 P. peu’stum (Dougl. in. bot. reg. 1318.) stem almost 
simple, ascending, glabrous; leaves deeply toothed : radical ones 
ovate-oblong: those near them spatulate; cauline leaves ob- 
long, acute, sessile: upper ones almost quite entire ; calyxes 
glabrous; limb of corolla flat, with retuse segments: upper 
ones the smallest. X. H. Native of North-west America, on 
scorched rocky plains in the interior. Peduncles axillary, many- 
flowered, the whole forming a panicle. Radical leaves on long 
petioles: upper cauline leaves half stem-clasping, all coarsely 
and unequally toothed. Corollas cream-coloured. Calyxes and 
corollas glabrous. 
Burned Pentstemon. 
foot. 
19 P. pirru'sum (Dougl. in bot. reg. t. 1132.) stem branch- 
ed ; leaves ovate-oblong, glabrous, unequally serrated ; pedun- 
cles axillary, many-flowered, the whole forming a terminal pani- 
cle; calyx turbinate, with jagged segments; sterile filament 
length of tube, bearded. 2). H. Native of North-west Ame- 
rica, in the district around the mouth of the Columbia river. 
Root creeping. Stems decumbent, radicant, branched, purple. 
Leaves evergreen. Inflorescence downy. Corolla purple, an 
inch long; upper lip retuse. 
Diffuse Pentstemon. Fl. June, Oct. 
2 feet. 
20 P. srATICIFOLIUM (Lindl. bot. reg. 1779.) stems ascend- 
ing, pubescent; radical leaves oblong-lanceolate, narrowed to 
the base, entire, glabrous ; cauline leaves sessile, cordate-ovate, 
toothed, pubescent; cymes nearly sessile, tomentose ; corolla 
ventricose, pubescent, X.H. Native of California. Radical 
leaves 7 inches long. Corolla violet, an inch long. The cymes 
being sessile, the flowers appear somewhat verticillate. 
bsp Pentstemon. Fl. June, Oct. Clt. 1834. 
2 feet. 
21 P. conprrüriUM (Benth. in scroph. ind. p. 7.) stem pru- 
1 
Fl. June, Sept. Clt. 1827. Pl. 1 
Clt. 1827. Pl. 13 to 
PE 
CHELONE#. 
I. PENTSTEMON. 
inose; leaves on short petioles, broad, ovate, obtuse, quite en- 
tire, cordate at the base, bullate, nerved beneath ; panicle loose; 
corollas tubular, deeply bilabiate ; upper lip emarginate: lower 
one trifid ; sterile filament bearded. 1. H. Native of Cali- 
fornia, Douglas. 
Heart-leaved Pentstemon. PI. ? 
29 P. rripay’trum (Dougl. in bot. reg. 1245.) humble; 
leaves 3-4 in a whorl, glabrous, bluntly cut: lower ones oblong: 
floral ones entire, linear-lanceolate, usually alternate; peduncles 
2-3-flowered, and are, as well as the calyxes, clothed with cob- 
webbed down; segments of corolla oblong, obtuse: those of 
the lower lip equal; sterile filament bearded. 2/. H. Native 
of North-west America, on the blue mountains, in the district 
watered by the river Columbia; and of Northern California. 
Stem branched. Flowers sparingly panicled. Calycine seg- 
ments ovate, acute. Corolla ventricose at the base, pale red. 
Three-leaved Pentstemon. FI. June, Sept. Clt. 1827. Pl. 
1 to 13 foot. 
23 P. cra‘cite (Nutt. gen. amer. 2. p. 52.) stem smooth and 
slender; leaves smooth, linear, acute, half stem-clasping, sharply 
serrulated ; panicle simple, few-flowered ; sterile filament beard- 
ed longitudinally ; corolla smooth inside; segments of the calyx 
linear-oblong. 2%. H. Native of North America, from the 
Arikarees to Fort Mandan, in depressed soils. Hook. bot. mag. 
2945. figure, but not the description. Corolla small, tubular, 
blue, ex bot. mag. ; pale purple, ex Nutt. Radical leaves lan- 
ceolate-ovate, entire: cauline ones pungently serrulated. 
Slender Pentstemon. Fl. June, Sept. Clt. 1824. Pl. 1 
foot. 
24 P. pusn’scens (Ait. hort. kew. 2. p. 360. Sims, bot. 
mag. 1424.) stem pubescent; leaves repandly serrulated, lan- 
ceolate-oblong, sessile, stem-clasping ; flowers in panicles ; the 
sterile filament bearded from the summit below the middle. 
4. H. Native of North America, in the Southern States, as 
in Carolina and Georgia. Cheléne Pentstémon, Lin. spec. 850. 
Asarina erécta, Mill. dict. no. 2. fig. t. 259.— Mor. hist. 3. p. 
417. sect. 11. t. 21. f. 2.  Corollas pale purple. 
: Downy Pentstemon. Fl. June, Sept. Clt. 
eet. 
25 P. urrsu'tum (Willd. spec. 3. p. 227.) stem and leaves 
hairy; leaves acuminated, repandly serrulated ; sterile fila- 
ment long, very villous at top; orifice of the lower lip of 
corolla pubescent. 2/.H. Native of Virginia. P. pubéscens, 
P, angustifólia, Martyn and Mill. no. 2. Chelóne hirsuta, Lin. 
spec. 849. Mill. dict. no. 3.— Mor. hist. 3. p. 417. sect. 1l. 
t. 21. f. 3.—Gron. virg. 71-93. 2, 3. Flowers pale purple. 
Perhaps only a variety of P. pubéscens. 
Hairy Pentstemon. Fl. Aug. Sept. Clt. 1758. Pl.1 foot. 
26 P. ræviea`rum (Ait. hort. kew. 2. p. 361. Sims, bot. 
mag. 1425.) glabrous ; lower leaves quite entire, petiolate : the 
rest repandly serrulated, sessile, or half stem-clasping, lanceo- 
late; sterile filament bearded at top ; orifice of the lower lip of 
corolla pubescent. %.H. Native of North America. Che- 
lone Penstémon, J. F. Mill. icon. 4. Arduin, spec. l. p. 14. 
t. 5.—Mor. hist. 2. p. 479. sect. 5. t. 8. f. 6. Flowers 
panicled.  Corollas purple. 
: Smooth Pentstemon. Fl. June, Sept. Clt. 1776. Pl. 1 to 2 
eet. 
1758. PH*2 
$ 4. Mrxica'wu. Sometimes herbs, but usually under- 
shrubs. Leaves lanceolate, sharply serrated. Stamens ex- 
serted. Superior filaments flat at the base, probably in all. 
Corollas tubular: lower lip usually bearded. Peduncles few- 
flowered, disposed in a terminal panicle. 
27 P. PULCHE’LLUM (Lindl. bot. reg. 1138.) stems herbace- 
ous, pubescent ; leaves sessile, ovate-lanceolate, serrulated, gla- 
