516 SCROPHULARIACE^E pentstemon 



purple, an inch long, funnelform, with rather long tube and ample throat: 

 stamens and inside of corolla glabrous, the sterile filament sometimes 

 bearded at the apex: capsule ovoid, about twice as long as the calyx. On 

 cliffs and rocky banks, Oregon and Washington. 



P. triphyllus Dougl. Lindl. Bot. Reg. t. 1245. Stems slender about 

 afoot high, usually simple: cauline leaves lanceolate or linear, an inch or 

 more lon^, rigid, from denticulate to irregularly pinuatifid-laciniate: the up- 

 per sometimes ternately verticillate, sometimes alternate: thyrsus narrow, 

 loosely paniculate: sepals lanceolate, acuminate: corolla comparatively small 

 and narrow, 6-9 lines long: sterile filament densely bearded at the apex. 

 Rocky banks, Oregon to Brit. Columbia. 



P. gracilentus Gray Pac. R. Rep. vi, 83. Glabrous: stems slender, 

 from a lignescent base, a foot or more high, r aher few-leaved, naked above, 

 terminating in loose and rather simple paniculate thyrsus: leaves glabrous 

 and green, entire, lanceolate or the upper linear and the lower sometimes 

 oblong, all narrowed at base: peduncles viscid-puberulent, 2-5-flowered, 

 the lower elongated: pedicels short: corolla blue or violet, half inch long, 

 slender-funnelform, moderately bilabiate, its lobes only 2 lines long, mode- 

 rately spreading: sterile filament slightly bearded. Mountains of southern 

 Oregon and adjacent California. 



P. Rcezli Regel Act. Hort. Petrop, ii, 326. Smooth below, the inflor- 

 escence more or less pubescent and glandular : stems 10-18 inches high from 

 a woody base: leaves all lanceolate or linear, or the lower oblanceolate, en- 

 tire, 1-3 inches long; thyrsus either narrow, or more diffuse and paniculate 

 with divergent branches: sepals ovate to lanceolate, about 2 lines long: corolla 

 blue, 8-10 lines long, funnelform, with rather long tube and campanulate 

 throat, sterile filament glabrous. On gravelly banks of streams, southern 

 Oregon and ^northern California. 



P. Cusickii Gray Proc, Am. Acad, xvi, 106. Pale and very minutely 

 pruinose-puberulent: stems a foot or less high, many from a barely lignescent 

 caudex, strict, equably leafy up to the racemiform loose thyrsus: leaves very 

 narrowly linear, an inch or two long by a line or more wide, or some of the 

 lower broader and spatulate: peduncles 1-2-flowered: sepals ovate, acuminate, 

 glabrous, not glandular: corolla harely 9 lines long, bright blue with purple 

 tube, a moderately enlarged throat and short lobes: sterile filament spatulate- 

 dilated at the very tip: very glabrous. On the slopes of Eagle Creek Moun- 

 tains, northeastern Oregon. 



P. Kingii Watson Bot. King 223 Pruinose or glandular-pubescent, at 

 least below, stems numerous from a shrubby base, ascending, 4-8 inches 

 high: leaves oblanceolate, mostly acute, entire, sessile with a narrowod base, 

 the lowermost somewhat spatulate and short-petioled, 1-2 inches long by 2-4 

 lines wide: thyrsus secund, short and rather leafy at base: peduncles 1-4-flow- 

 ered: sepals ovate or oblong-lanceolate, more or less acuminate: corolla 8 

 lines long, purple, dilated upward, somewhat bilabiate : sterile filament 

 flattened toward the apex, glabrous. In the mountains of eastern Oregon 

 to Nevada. 



P. azureus Benth. PI. Hartw. 327. Glabrous and glaucous, rarely 

 pruinose-puberulent: stems erect or ascending from a woody base, 1-3 feet 

 high: leaves from narrowly- to ovate-lanceolate or even broader, the upper 

 ones wider at base, the lowest more or less petioled, 1-2 inches long: thyrsus 

 virgate, loose, usually elongated : sepals ovate or oblong, scarious-margined, 

 with or without a conspicuous acumination, about 2 lines long: corolla 1-134 

 inches long, azure-blue verging or changing to violet, the base sometimes red. 

 disk, broadly funnelform, the expanded limb sometimes an inch in diameter: 



