638 



CHELONE,E. I. PENTSTEMON. 



eel, 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. If.. 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 

 brilliancy those of P. specidsum. 



Prumose Pentstemon. Fl. June, Sept. Clt. 1827. PI. \ to 

 1 1 foot. 



^ 3. Corolla bilabiate. Upper lip of corolla compressed; the 

 loner plaited. 



16 P. GLAU'CUM (Graham, in edinb. phil. journ. 1829. p. 348. 

 Lindl. hot. 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. If. . H. Native of Arctic America. 

 P. gracile, 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. PI. 1 foot. 



17 P. ATTENUA'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. 

 1. 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. Clt. 1827. 

 PI. li to 2 feet. 



18 P. DEU'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. 1.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. Fl. June, Sept. Clt. 1827. PI. 1 

 foot. 



19 P. DIFFU'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. 7/.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. Clt. 1827. PI. l| to 

 2 feet. 



20 P. STATICIFOLIUM (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. If. . H. Native of California. Radical 

 leaves 7 inches long. Corolla violet, an inch long. The cymes 

 biing sessile, the flowers appear somewhat verticillate. 



Stalice- leaved Pentstemon. Fl. June, Oct. Clt. 1834. PI. 

 2 feet. 



21 P. CORDIVOLIUM (Benth. in scroph. ind. p. 7.) stem pru- 



1 



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. If.. H. Native of Cali- 

 fornia, Douglas. 



Heart-leaved Pentstemon. PI. ? 



22 P. TRIPHY'LLUM (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. If. . H. Native 

 of North-west America, on the blue mountain?, 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. Fl. June, Sept. Clt. 1827. PI. 

 1 to 1| foot. 



23 P. GRA'CILE (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. 1. 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 Ian-, 

 ceolate-ovate, entire : cauline ones pungently serrulated. 



Slender Pentstemon. Fl. June, Sept. Clt. 1824. PI. 1 

 foot. 



24 P. PUBE'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. 

 3J.. H. Native of North America, in the Southern States, as 

 in Carolina and Georgia. Chelone Pentstemon, Lin. spec. 850. 

 Asarina erecta, Mill. diet. no. 2. fig. t. 252. Mor. hist. 3. p. 

 417. sect. 11. t. 21. f. 2. Corollas pale purple. 



Downy Pentstemon. Fl. June, Sept. Clt. 1758. PI. 2 

 feet. 



25 P. HIRSU'TCM (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. pubcscens, 

 /3, angustifolia, Martyn and Mill. no. 2. Chelone hirsuta, Lin. 

 spec. 849. Mill. diet. no. 3. Mor. hist. 3. p. 417. sect. 11. 

 t. 21. f. 3. Gron. virg. 71-93. 2, 3. Flowers pale purple. 

 Perhaps only a variety of P. pubescens. 



Hairy Pentstemon. Fl. Aug. Sept. Clt. 1758. PI. 1 foot. 



26 P. L;EVIGA V TUM (Ait. hort. kew. 2. p. 361. Sirns, 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, 'y.. H. Native of North America. Che- 

 lone Penstemon, J. F. Mill. icon. 4. Arduin, spec. 1. 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. PI. 1 to 2 

 feet. 



4. MEXICA'N^:. 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. FULCHE'LLUM (Lindl. bot. reg. 1138.) stems herbace- 

 ous, pubescent ; leaves sessile, ovate-lanceolate, serrulated, gla- 



