514 . SCROPHULARIACE^E pentstemon 



below, the inflorescence more or less viscid-pubescent: stems numerous 

 from the woody base, 3-10 inches high, very leafy : leaves about an inch 

 long, the lower ones spatulate or oblanceolate, short-petioled, somewhat 

 glaucescent, the upper ones oblong or linear-oblong, sessile and some- 

 what clasping, all entire or sometimes somewhat serrulate: thyrsus strict 

 and virgate, ^-4 inches long: peduncles short 1-5-flo we red: sepals, ovate 

 or lanceolate and acuminate lax, about 3 lines long : corolla deep blue or 

 partly white, 6-8 lines long, tubular-funnelform, bilabiate, the lower lip 

 somewhat hairy within : sterile filament bearded with yellow hairs : On 

 Dry ridges, eastern Oregon toNevada and the Rocky Mountains. 



P. stenosepalus. P. glaucus var. stenosepalus Gray. Glabrous or 

 more or less rough-pubescent below, the inflorscence villous-pubescent 

 and viscid : stems % to 2 feet high : lower leaves ovate or oblanceolate to 

 linear spatulate, mostly dentate, including the petiole 1-4 inches long: 

 upper ones lanceolate with broad clasping base: thyrsus small and glomer- 

 ate: sepals attenuate-lanceolate, 3-4 lines long: corolla dull whitish 

 to lurid purple or blue, 10-12 lines long, campanulate-ventricose above the 

 verj- short proper tube, the mouth widely spreading, the broad lower lip 

 sparsely bearded within : sterile filament bearded near the apex. Plains of 

 eastern Oregon to Nevada and the Rocky Mountains. 



P. Battani Gray Syn. Fl. Supp. 441. Glabrous: stems 1-3 feet high: 

 leaves membranaceous, broadly lanceolate, 3-8 inches long finely dentate, 

 radical and lowest cauline attenuate at base into margined petioles, the 

 others half clasping by subcordate base : inflorescence glandular- pubescent, 

 cymes from the lower axils long-peduncled, upper short-peduncled or sub- 

 sessile: pedicels short or hardly any: sepals oblong-lanceolate, acuminate, 

 soft-membranaceous, loose, 4 lines long : corolla pale purple, an inch long, 

 funnelform, with short tube and campanulate throat, distinctly bilabiate, 

 lower lip villous-bearded within : sterile filament at length exserted, beard- 

 ed at the apex. In open forest, Siskiyou mountains of Oregon and Cali- 

 fornia : also reported from Idaho. 



Var, minor Gray 1. c. slender, with oblong leaves only an inch or 

 two long, obscurely denticulate : thyrsus simple : flowers one-half smaller : 

 sepals attenuate : corolla 6-7 lines long. With the type. 



P. deustus Dougl. Lindl. Bot, Reg. t. 1318, Completely glabrous, 

 the calyx at most glandular: stems slender, 1-2 feet high, numerous from 

 a woody base, strict : leaves thickish, from ovate to oblong-linear or lanceo- 

 late, 1-2 inches long, regularly and rigidly dentate or acutely serrate or 

 some of them entire; the upper cauline «losely sessile : thyrsus virgate or 

 more paniculate, mostly many -flowered : pedicels short : sepals from ovate 

 to lanceolate or subulate, nearly marginless, acute, 2-3 lines long: corolla 

 ochroleucous or dull white, sometimes partly blue, minutely pubescent, 

 4-8 lines long, either narrowly or rather broadly funnelform, the short 

 lobes widely spreading: sterile filament glabrous, or rarely exserted and 

 sparsely bearded. On gravelly banks in the dry interior region, Brit. Co- 

 lumbia to California, Nevada and Montana. 



P. Gairdneri Hook. Fl. ii, 99. Cinereous-puberulent : stems rigid, 

 2-10 inches high, tufted on the stout shrubby base: leaves linear or the 

 lower more or less spatulate, 6-12 lines long, all usually sessile, the upper 

 ones mostly alternate : thyrsus short : peduncles short and mostly alternate, 

 usually 1-flowered: sepals oblong-ovate to lanceolate, acute or acuminate, 

 3-4 lines long: corolla 6-10 lines long, dark blue or purple, narrow funnel- 

 form, sterile filament bearded on one side. On high rocky ridges eastern 

 Washington and Oregon to Nevada. 



Var. hiatus Piper Bull. Torr. Club xxvii, 396, Sepals larger: corolla 

 larger and more spreading. Northwestern Washington. 



