772 SCROPHULARIACEAE 



lower Up white-hairy in the throat. Plains and dry valleys: Colo. Submont. 

 Mont. My-Jl. 



43 P. pumilus Nutt. Stems less than 1 dm. high, grayish-puberulent ; 

 basal leaves linear-oblanceolate to spatulate, 1-3 cm. long, grayish-puberulent; 

 stem-leaves linear; calyx 4.5 mm. long, viscid-puberulent ; corolla about 18 mm. 

 long, slightly viscid-puberulent; sterile stamen yellow-bearded half its length. 

 Hills: Mont. Ida. Submont. 



44. P. albidus Nutt. Stems 1.5-4 dm. high, puberulent, viscid-villous 

 above; lower leaves petioled, lanceolate or oblanceolate, 3-8 cm. long, densely 

 puberulent; upper leaves linear or linear-lanceolate, entire or dentate; calyx 

 viscid-villous, 5-7 mm. long; lobes lanceolate; corolla about 2 cm. long, viscid- 

 puberulent. Prairies and plains: Man. Kans. Colo. Ida. Alta. Plain. 

 My-Jl. 



45. P. Harbourii A. Gray. Stems 5-15 cm. long, decumbent at the base, 

 puberulent; leaves thick, oval or obovate, the lower petioled, the upper sessile, 

 green and puberulent or glabrate; flowers few. crowded; calyx viscid-villous, 

 6-8 mm. long; lobes lanceolate; corolla purple, 2 cm. Jong; lower lip pubescent 

 in the throat; sterile stamen spatulate, yellow-bearded half its length. P. Bakeri 

 Greene. Rock-slides, on the higher peaks: Colo. Mont. Alp. Jl-Au. 



46. P. deustus Dougl. Perennial, with a 'woody base; stem glabrous, 1-4 

 dm. high; leaves firm, ovate, oblong or lanceolate, 1-3 cm. long; the lower petioled, 

 the upper sessile; calyx glabrous or glandular-puberulent, 4 mm. long; lobes 

 ovate or lanceolate, acute; corolla ochroleucous or dull-white, 1(>-12 mm. long; 

 sterile stamen glabrous, occasionally anther-bearing. Dry regions: Mont. 

 Wyo Nev. Calif. B.C. Son. Submont. My-Jl. 



47. P. confertus Dougl: Stem slender, 1-5 dm. high, glabrous; lower 

 leaves oblanceolate, 5-15 cm. long, glabrous, thin, entire; stem-leaves linear 

 to lanceolate, acute; inflorescence interrupted; calyx 5 mm. long; lobes lanceolate 

 to broadly ovate, abruptly acuminate, scarious-margined, erose; corolla 1 cm. 

 long; lower lip bearded within. Dry banks and hills: B.C. Calif. Wyo. 

 Alta. Submont. My-Jl. 



48. P. Watsonii A. Gray. Steni glabrous or glaucous, 3-5 dm. high; stem- 

 leaves lanceolate, glabrous, sessile, acute or acuminate, 3-5 cm. long; calyx-lobes 

 scarious-margined; corolla 12-15 mm. long, violet-purple; sterile stamen club- 

 shaped, yellow-bearded. P. phlogifolius Greene. Dry plains: Nev. Ida. 

 Utah Ariz. Jl. 



49. P. Rydbergii A. Nels. Stem 2-4 dm. high; basal leaves oblanceolate, 

 petioled, 3-5 cm. long, entire, mostly acute or obtuse; stem-leaves sessile, oblong 

 or lanceolate, entire, acute or the uppermost acuminate; calyx-lobes tinged with 

 dark purple and white, with an erose-dentate margin; corolla purple, with very 

 dark limb, 10-15 mm. long; lower lip bearded on the inside; sterile stamen nar- 

 rowly clavate, short-bearded. P. erosus Rydb. P. latiusculus Greene. P. 

 lacerellus Greene. Mountains: Wyo. Colo. Nev. Ida. Submont. Mont. 



50. P. laxus A. Nels. Stem slender, 5-8 dm. high, minutely puberulent; 

 lower leaves linear-oblanceolate, the upper lanceolate or linear-lanceolate, min- 

 utely puberulent; flowers in a short thyrsus; corolla vivid-blue, about 12 mm. 

 long, densely bearded inside the lower lip; sterile stamen not dilated, blue at 

 the tip, curved at the apex, sparingly hairy or glabrate. Sage-brush lands : Ida. 

 Jl. 



51. P. procerus Dougl. Stem decumbent at the base, 1-3 dm. high, gla- 

 brous or puberulent; basal leaves petioled, oblanceolate or linear-oblanceolate, 

 glabrous, 4-8 cm. long; inflorescence usually compact, but in large specimens 

 interrupted below; calyx glabrous, 5 mm. long; lobes obovate or cuneate, abruptly 

 cuspidate, scarious-margined and erose; corolla dark purplish blue; lower lip 

 bearded within. P. micranthus Nutt. P. confertus coeruleo-purpureus A. Gray. 

 Hills and mountains: Sask. Colo. Calif. B.C. Yukon. Plain Subalp. Je- 

 Au. 



