SPECIES OS PENTSTEMON. 167 



P. ELLiPTicus. Herbaceous to the base, a foot high or more, 

 rather stout, glabrous throughout, glaucescent: basal leaves 

 ample, slender petioled, the elliptic-blades 2J or 3 inches loug, 

 thin, faintly 3-nerved, the cauline all reduced, lanceolate, sessile 

 by a broad base, much shorter than the internodes, those next 

 the inflorescence denticulate : thyrsus large for the P. cotifertus 

 group, the false whorls 5 or 6, but mostly approximate: sepuls 

 long, lanceolate, acuminate, broadly scarious and often toothed 

 or serrated : corollas purple, J inch long, rather broad as to both 

 tube iind limb, scarcely ventricose, lower lip bearded, as also the 

 sterile filament at tip and below it. 



Type in U. S. Herb, from some unrecorded station in the 

 State of Washington, in 1889, by G. K. Vasey, n. 446. 



P. VEROKic^FOLius. Herbaccous throughout, or old plants 

 with short suffrutescent base, stout, a foot high, glabrous except 

 as to inflorescence, glaucescent : basal leaves small, elliptic- 

 lanceolate, petiolate, entire, cauline larger, in about 5 pairs, 

 oblong to lanceolate, sessile, 2 or 3 inches long, entire, or 

 more or less distinctly denticulate: thyrsus much interrupted, all 

 parts glandular-pubescent : sepals lanceolate, acuminate, scari- 

 ous-edged : corolla % inch long, with narrow-funnelforni tube 

 and bilabiate, only sparsely hairy limb. 



Known to me only as collected by Sandberg, in Idaho, in 1892, 

 the type from Lake Waha, n. 245, and larger plant with leaves 

 all entire, from Viola, Latah Co., n. 479. The leaves in all 

 respects, save as to the bloom on them, recall those of some large 

 Veronica. 



P. Albeetikus. Near P. humilis, about as large, more slender, 

 the foliage thinner : basal leaves 2 inches long, of ovate-elliptic 

 acute blade and slender petiole of equal length, cauline in about 

 3 pairs, oblong to ovate-lanceolate, 1 to H inches long, shorter 

 than the internodes, often like the basal quite entire, some den- 

 ticulate, all parts glabrous : thyrsus rather lax : sepals lanceo- 

 late, acute : corolla blue, I inch long, tube ventricose, limb 

 ample, loosely bearded, as alsathe sterile filament at tip. 



Sheep Mountain, Alberta, July, 1895, Mr. John Macoun, 

 Geol. Surv. n. 11865, as in my herbarium. 



