Pentstemon. SCROPHULARIACEjE. 265 



P. MurrayartUS, Hook. Cauline leaves connate-clasping, and all the upper pairs 

 united into an oval or orbicular concave disk : pedicels slender : corolla deep scarlet, grad- 

 ually widening upward; the lobes rather small: sterile filament wholly glabrous. — Bot. 

 Mag. t. 3472; Gray, I.e. — Prairies of E. Texas, collected first by Berlandier, then by 

 Drummond, &c. 



-)— -f— Glabrous and glandless throughout, even to the calyx : leaves oblong or ovate, rigid, glau- 

 cescent, very acutely and as it were spinulosely dentate or denticulate with salient .teetli : cvnies 

 of the open elongated thyrsus pedunculate: flowers ample and showy; the corolla an inch long: 

 sepals ovate, short. 



P. spectabilis, Thurber. Pale or glaucescent, 2 to 4 feet high : leaves thinnish-coria- 

 ceous, ovate or ovate-lanceolate or the lower oblong, acute ; the upper pairs acuminate 

 and their broad bases connate-perfoliate : thyrsus many -flowered, elongated-pyramidal or 

 sometimes virgate, a foot or two long : peduncles and pedicels slender (half inch or more 

 long) : corolla rose-purple or lilac with the ample limb usually violet or blue, a full inch 

 long, with narrow proper tube twice the length of the calyx, then abruptly dilated into 

 the campanulate-ventricose or broadly f unneiform throat, moderately bilabiate ; the oval 

 or roundish plane lobes 3 or 4 lines long : sterile filament glabrous. — Gray in Paeif . R. Rep. 

 iv. 19, & Bot. Mex. Bound. 113 ; Hook. Bot. Mag. t. 5260. — Dry hills and plains, S. Cali- 

 fornia (from San Gabriel) to Arizona and New Mexico. 



I (_, P. Cleavelandi, Gray. Resembling the preceding in foliage and growth : but leaves 

 less broad at base and commonly distinct, sometimes connate-perfoliate ; the lower on 

 naked petioles : thyrsus smaller and virgate : corolla crimson, three-fourths to a full inch 

 long, much narrower, tubular-f unneiform ; its lobes H or 2 lines long : sterile filament mod- 

 erately bearded above on one side. — Proc. Am. Acad. xi. 94 & Bot. Calif, i. 059. — S. E. 

 California, San Diego Co., Cleveland, Palmer, and San Bernardino Co., at Cucamonga, long 

 ago collected (panicles only) by Wallace, and now near San Bernardino, by Parry & Lem- 

 mon. (Adjacent ilex.) 



.f— -t— -t— Very glabrous up to the loose elongated inflorescence and ovate appressed sepals: 

 leaves coriaceous, glaucous, ovate or oblong-lanceolate, mostly spinulose dentate : corolla abruptly 

 much enlarged and remarkably wide. 



• ' P. Paimeri, Gray. Stems 2 or 3 feet high : leaves 1| to 4 inches long ; the lower peti- 

 oled ; upper from closely sessile to completely connate-perfoliate, and from very sharply 

 dentate or denticulate to nearly entire : thyrsus pyramidal-racemiform, glandular or 

 pruinose-puberulent : lower peduncles 2-3-flowered, as long as the pedicels : corolla cream- 

 white and usually suffused or parti-colored with pink; the short narrow proper tube 

 hardly surpassing the calyx, very abruptly dilated into the ventricose-campanulate throat 

 of about three-fourths inch in length and width at orifice ; the lips broad ; the upper 

 erectish and 2-lobed ; lower 3-parted, widely spreading, sparingly bearded at base : sterile 

 filament long- and densely (yellow-) bearded above. — Proc. Am. Acad. vii. 378, & viii. 

 291 ; Watson, Bot. King, 220 ; Hook. f. Bot. Mag. t. 6064 (very highly colored). —Arizona 

 and S. Utah to W. Nevada and S. E. California. 



-K- •)— -i— •<— Puberulent or pubescent and above viscid or glandular : leaves from ovate to lan- 

 ceolate-linear : thyrsus raeemiform : corolla ample, purplish ; its proper tube little if any longer 

 than the lanceolate sepals, abruptly dilated into the ventricose-campanulate or broadly funnel- 

 form throat ; the spreading limb obscurely bilabiate : sterile filament more or less long-bearded. 



++ Corolla commonly 2 inches long : thyrsus lax and short : stem about a foot high : leaves large 

 and broad, most of them acutely denticulate or serrate. 



P. Cobeea, Nutt. Soft-puberulent : leaves ovate or oblong, or the lower broadly lanceo- 

 late and the upper subcordate-clasping (2 to 4 inches long) : corolla abruptly campanulate- 

 ventricose above the narrow tube, from dull reddish purple to whitish, glabrous within : 

 slender sterile filament sparsely bearded. — Trans. Am. Phil. Soc. n. ser. v. 182 ; Hook. Bot. 

 Mag. t. 3465. — Prairies, Kansas to Texas. 



++ ++ Corolla about an inch long : thyrsus strict, leafy below : stems a span or two high : leaves 

 narrower, mostly entire, or the margins undulate. 



P. Jamesii, Benth. Pruinose-puberulent: leaves all narrowly or linear-lanceolate (1£ to 

 3£ inches long) : corolla abruptly dilated into a broadly cyathiform-campanulate throat, a 

 little hairy within: sterile filament moderately bearded. — DC. Prodr. x. 325; Gray, Proc. 

 Am. Acad. vi. 67. P. albidus, in part, Torr. in Ann. Lye. N. Y. ii. 229, not Nutt. — Prai- 

 ries, &c, S. Colorado, New Mexico, and W. Texas. 



