276 SCEOPHULARIACE^. (FIGWORT FAMILY.) 



to violet : sterile filament mostly bearded at the dilated tip. — From the Sas- 

 katchewan and Upper Missouri to Oregon, ]S"e\v Mexico, and W. Texas. 



10. P. caeruleus, Nutt. Like the last, but low : leaves all from lanceolate 

 to narrowlij linear: thyrsus spiciform and usually dense: sepals lanceolate- 

 acuminate : corolla blue, varying occasionally to rose-lilac or white : sterile fila- 

 ment much bearded above. — Plains of the Dakotas and Montana to Colorado. 

 ^- -i- Puherulent or pubescent and above viscid or glandular : leaves from oblong 



to lanceolate-linear, entire or the margins undulate: thi/rsus racemiform : 

 corolla ample, purplish ; its tube little if am/ longer than the sepals, abruptlij 

 dilated into the campanulate or broadly f unnelf arm throat. 



11. P. Jamesii, Benth. Pruinose-pubemlent : leaves all narrowly or 

 linear-lanceolate : corolla abruptly dilated into a broadly cyathiform-campanulate 

 throat, a little hairy within : sterile filament moderately bearded. — Prairies, S. 

 Colorado to New Mexico and W. Texas. 



12. P. cristatUS, Nutt. Pubescent, or above viscid-villous : leaves from 

 linear-lanceolate to narrowly oblong: corolla more funnelfo7'm,he\ng less ab- 

 ruptly dilated ; its lower lip long-villous within : sterile filament more exserted, 

 inordinately yellow-bearded. — From the Dakotas to Nevada and S. Colorado. 

 ^- ^- -t- Puberulent or viscid-pubescent, at least the inflorescence, or sometimes 



glabrous: leaves various : corolla from 4 lines to an inch long, not abruptly 



campanulate-ventricose above : sepals usually narrow or acuminate. 



•w- Leaves from ovate to lanceolate, undivided : stems erect or ascending : thyrsus 



mostly many -flowered. 



= Corolla hardly at all bilabiate, funnelform, with widely spreading lobes, 



ivhitish or tinged with purple. 



13. P. albidus, Nutt. Viscid-pubescent, 6 to 10 inches high: leaves 

 oblong lanceolate or narrow, entire or sparingly denticulate : thyrsus strict, 

 leafv helow , of approximate few to several-flowered clusters: sepals densely viscid- 

 pubescent, 3 or 4 lines long: corolla with shorter tube, the rather ample limb 

 about as broad. — On the plains from the Dakotas to Colorado and Texas. 



14. P. deustus, Dougl. Completely glabrous, or the calyx obscurely 

 glandular, a span to a foot high in tufts from a woody base, rigid : leaves 

 coriaceous, from ovate to oblong-linear or lanceolate, irregularly and rigidly 

 dentate or acutely serrate, or some of them entire : thyrsus virgate or more 

 paniculate, mostly many-flowered : corolla narrowly or broadly funnelform, 

 half-inch or less long. — In the interior from California to British Columbia 

 and eastward into Montana. 



= = Corolla more plainly bilabiate ; lower lip usually somewhat bearded or 

 pubescent icithin. 



15. P. eonfertUS, Dougl., var. cseruleo-purpureus, Gray. Gla- 

 brous throughout, or the inflorescence and calyx viscid-pubescent or puberu- 

 lent, from 2 inches to 2 feet high : leaves from oblong or oblong-lanceolate to 

 somewhat linear, usually entire : thyrstis spiciform, interrupted, naked, of 2 to 

 5 dense verticillate flower clusters, or in the low mountain forms with capituli- 

 form inflorescence: pedicels very short: sepals variable, usually broad, co7n- 

 monly very scarious and erase, sometimes with a long herbaceous acumination ; 

 corolla narrow, 4 to 6 lines long, blue-purple and violet ; lower lip conspicu- 



