CHELON&. I. PEXTSTEMOX. 



637 



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. If. 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. 



Shorty Pentstemon. Fl. June, Sept. Clt. 1827. PI. 2 to 

 3 feet. 



6 P. ACDMINA'TUM (Dougl. in bot. reg. t. 1285.) 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. If. . 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. specibsum. Radical leaves tufted. Sterile filament 

 shorter than the tube of the corolla, pilose, and hooked at top. 



sfcuminated-leaved Pentstemon. Fl. June, Sept. Clt. 1827. 

 PI. 1 to lifoot. 



7 P. PC'MILUM (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. I/. H. Native near the sources of 

 the Columbia river, on the borders of the little Goddin river. 

 Root large. Stem not more than 3-4 inches high. Flowers 

 large. 



Dwarf Pentstemon. PI. 5 to J foot. 



8 P. COB.E'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. 



Cobcea-fiowered Pentstemon. Fl. May, Sept. Clt. 1835. 

 PI. 2 to 3 feet. 



9 P. DIGITA'LIS (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- 

 ed at top. If.. H. Native of the Arkansas, in wet woods and 

 prairies common. Sweet, fl. gard. t. 120. Said to be allied to 

 P. campanutatum. 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. 



Foxg/oce-flowered Pentstemon. Fl. June, Sept. Clt. 1824. 

 PL li to 2 feet. 



2. Plotters appearing as if they were rerticillale. Corolla 



bilabiate. 



10 P. TUBIFLORUM (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 ; 



calycine segments ovate ; corolla tube-formed : limb villous 

 inside; sterile filament bearded. If.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. 



IIP. OVA'TCM (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. 

 "if. . 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. 



Orate-leaved Pentstemon. Fl. June, Sept. Clt. 1826. PI. 

 4 feet. 



12 P. PROCERCM (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. If. . 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. PI. 1 to 2 feet. 



13 P. CONFE'ETUM (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. T. 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. 



Crowded-flowered Pentstemon. Fl. June, Sept. Clt. 1827. 

 PI. 1 to 2 feet. 



14 P. MICEA'NTHCM (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. If. . 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-flonered Pentstemon. PI. 1 to l foot. 



15 P. PRUINOSUM (Dougl. in bot. reg. t. 1280.) leaves grey: 

 radical ones petiolate, entire, or toothed : cauline leaves tooth- 



