SCROFHULARIACE^. (FIGWORT FAMILY.) 277 



ously bearded within, — Mountains of Colorado and northward, thence west- 

 ward to Oregon and through the Sierra Nevada. 



16. P. Watsoni, Gray. Glaucescent and glabrous throughout, or inflo- 

 rescence and calyx puberulent, but not viscid, a foot or more high : cauline 

 leaves oblong-lanceolate to ovate-lanceolate, acute or acuminate, entire or 

 denticulate : contracted thyrsus rather loose : pedicels longer than the calyx : 

 sepals broadly ovate or orbicular, somewhat scarious-margined : corolla narrowly 

 funnelform, 6 to 8 lines long, violet-purple or partly white ; lower lip almost 

 glabrous within. — Synopt. Fl. ii. 267. P. Fremonti, var. Parryi, Gray. Moun- 

 tains of W. Colorado, Utah, Nevada, and Arizona. 



17. P. humilis, Nutt. Glabrous or viscid-pubescent above, a span or two 

 high: leaves glaucescent, from oblong to lanceolate; the cauline commonly 

 denticulate : thyrsus strict and virgate, 2 to 4 inches long : pedicels short : sepals 

 ovate or lanceolate and acuminate : corolla narrowly funnelform, half-inch long, , 

 deep-blue or partly white ; lower lip somewhat hairy within. — In the mountains 

 from S. Colorado to the British boundary and westward. 



Var. brevifolius, Gray. A low and diffuse tufted form, with weak 

 stems : leaves at most half-inch long ; cauline elliptical-oblong ; the radical 

 oval or rotund : corolla light blue. — Synopt. Fl. ii. 267. In the Wasatch 

 Mountains of Utah at 9,000 or 10,000 feet elevation. 



18. P. gracilis, Nutt. A foot or less high, glabrous or merely puberu- 

 lent up to the more or less viscid-pubescent strict thyrsus: stems slender : cauline 

 leaves mostly linear-lanceolate, sometimes denticulate ; the radical spatulate or 

 oblong: cymes of the thyrsus pedunculate : sepals lanceolate, acute, marginless: 

 corolla tubular-funnelform or almost cylindraceous, lilac-purple or sometimes 

 whitish, 4 to 1 inch long ; the throat open. — P. pubescens, var. gracilis, Gray. 

 From Colorado to Wyoming and the Saskatchewan. 



19. P. glauCUS, Graham. Glabrous up to the inflorescence, more or less 

 glaucous : stems dwarf or ascending, a span to a foot high : leaves thickish, 

 oblong-lanceolate or the radical obloDg-ovate, entire or denticulate : thyrsus short 

 and compact, either simple or compound, villous-pubescent and viscid or glandular : 

 corolla dull lilac or violet-purple, less than an inch long, swollen above the short 

 tube, gibbous; the throat widely open; the broad lower lip sparsely villous- 

 bearded within. — Mountains of Wyoming, Utah, and far northward. 



Var. stenosepalus, Gray. Sometimes over a foot high : thyrsus com- 

 paratively small and glomerate: sepals attenuate-lanceolate: corolla dull 

 whitish or purplish. — Mountains of Colorado and Utah. 



+* *+ Leaves from linear-spaiulate to obovate, entire : stems low-cespitose 

 spreading, leafy to the summit, few-flowered. 

 = Leaves green and mostly glabrous, J to J inch wide. 



20. P. Harbourii, Gray. Tufted nearly simple stems 2 to 4 inches 

 high, puberulent : leaves about 3 pairs, thickish, obovate, oval, or the upper- 

 most ovate, these sessile by a broad base : thyrsus reduced to 2 or 3 crowded 

 short-pedicelled flowers : sepals villous and somewhat viscid : corolla little 

 bilabiate, with rather broad cylindraceous throat and tube ; lower lip bearded 

 within. — Proc. Am. Acad. vi. 71. High alpine region of the Colorado 

 Mountains. 



