PENTSTEMON SCROPHULARIACEjE 515 



P. Oreganns. P. Gairdneri var. Oreganus Gray. Cinereous- puber- 

 ulent and the inflorescence glandular: stems numerous from a much 

 branched woody base, very slender, 4-8 inches high : leaves linear or the 

 lowest ones linear-spatulate, about an inch long by a line or less wide, all 

 opposite : thyrsus very narrow and loose ; the peduncles mostly 1-flowered : 

 sepals oblong-lanceolate, acute, about 2 lines long: corolla tubular or but 

 little funnelform, 8-10 lines long, obscurely bilabiate and the lips but little 

 spreading: sterile filament bearded on the upper side. On dry ridges, 

 southeastern Oregon. 



P. laricifolius H. & A. Bot. Beech. 376. Glabrous: stems tufted, 2-5 

 inches high : lignescent caudex not rising above the soil : leaves very slen- 

 der, when dry filiform, the larger a fourth of a line wide, and with the 

 margins revolute, an inch or less long, much crowded in subradical tufts 

 and scattered on the filiform flowering stems: flowers few, loosely racemose, 

 slender- pedicelled: sepals ovate-lanceolate: corolla tubular-funnelform, 

 6 lines long, the small purple limb obscurely bilabiate : sterile filament 

 bearded on the upper side. Interior of Oregon to Wyoming. 



2 SACCANTHERA Benth. Bot. Mag. t. 3391. Herbaceous 

 perennials, some woolly at base, mostly with ample and showy flow- 

 ers. Anthers sagittate or horseshoe-shaped: the cells confluent at 

 the apex, and there dehiscent by a continuous cleft, which extends 

 down both sides only to the middle: the base remaining closed and 

 saccate : sometimes hirsute never lanate. 



P. l a ndii Jos us Lindl. Bot. Reg. t. 1262. Soft-pubescent and viscid : 

 stems rather stout 2-3 feet high : leaves broad and thinnish, the lower 

 ones from ovate to oblong, 6-8 inches long, dentate : upper ones from ovate - 

 lanceolate and acuminate, to cordate- clasping, usually denticulate : thyrsus 

 contracted and interrupted, leafy below : cymes short-pedunculate, few-sev- 

 eral flowered: sepals attenuate-lanceolate,"lax, 6-8 lines long: corolla L-I% 

 inches long, with funnelform inflate 1 throat and broad spreading lips : 

 sterile filament glabrous. On moist prairies eastern Oregon to Washington 

 and Idaho. 



P. vennstns Dougl. Lindl. Bot. Reg. t. 1309. Very glabrous: stems 

 rather strict and simple, 1-2 feet high, leafy : leaves thickish in texture, 

 oblong -lanceolate or the upf>er ovate-lanceolate, closely and subulately 

 serrate, about 2 inches long: thyrsus naked, mostly narrow: peduncles 

 1-3-flowered: sepals ovate, acute or acuminate, only a line or 2 long, much 

 shorter than the narrow proper tube of the corolla : upper part of the fer- 

 tile filaments and of the sterile one (as also usually anthers and lobes of 

 the corolla within), sparingly pilose. Eastern Oregon to Idaho. 



P. diffusus Dougl. Lindl. Bot. Reg. t. 1132. Glabrous or merely pu- 

 berulent: stems numerous, diffuse, 10-18 inches high: leaves thin, from 

 oyate to oblong- lanceolate or the upper subcordate, sharply and unequally, 

 sometimes laciniately, serrate, 1-4 inches long: thyrsus commonly inter- 

 rupted and leafy : pedicels mostly shorter than the ovate or lanceolate and 

 acuminate, sometimes laciniate- toothed sepals : corolla 8-12 lines long, 

 violet, funnelform, the lips widely spreading: anthers and inside of corolla 

 glabrous : sterile filament more or less hairy above. On wooded rocky 

 banks of the Cascade Mountains in Oregon to Brit. Columbia. 



P. Richardson! Dougl. Lindl. Bot. Reg. t. 1121. Glabrous through- 

 out: stems very diffuse or decumbent, 6-18 inches long, simple or panicu- 

 lately branched above : leaves from ovate to narrowly lanceolate in outline, 

 and from entire or incisely toothed to laciniate-pinnatifid, 1-3 inches long, 

 often alternate: thyrsus loosely panicled, the peduncles 2-flowered: sepals 

 ovate to ovate-lanceolate, acute, about 2 lines long : corolla bright red to 



