510 SCROPHULARIACE.E PENTSTEMON 



long, obovate, more or less dentate, most of them petioled : flowering stems 

 1-6 inches long, bearing several pairs of orbicular or oblong leaf-like bracts : 

 pedicels slender: sepals lanceolate, acute, about 4 lines long : corolla purple, 

 tubular-funnelform, an inch or more long, moderately bilabiate; the lower 

 lip bearded within : stamens included : sterile filament densely bearded. 

 On rocks and volcanic sands, Brit, Columbia to California. 



P. Dayidsonii Gre'ene Pitt, ii, 241 A low semiherbaceous under- 

 shrub, the proper stems horizontal and rooting at the joints, usually intri- 

 cately branched : flowerinng, and ascending sterile stems 1-3 inches long, 

 very leafy: leaves fleshy, from oblong or obovate to orbicular, entire, 3-6 

 lines long, short-petioled, glabrous both sides; peduncles leafy-bracted, 

 glandular-hairy, 1-4-flowered : sepals ovate to lanceolate, often acuminate, 

 3-4 lines long : corolla an inch long, lilac-purple, ventricose from the tips 

 of the sepals, the lobes rather short and not very unequal; the lower lip 

 woolly within : sterile filament less than half as long as the others, strongly 

 bearded at and near the apex. On the highest peaks of the Cascade and 

 and Sierra Nevada Mountains. 



P. Lyallii Gray Syn. Fl. Supp. 440. Puberulent or nearly glabrous 

 up to the racemiform inflorescence : flowering stems 2 feet high, herbace- 

 ous (the base unknown) : leaves elongated-linear or linear-lanceolate, 3-5 

 inches long, 2-4 lines wide, sparingly serrulate : sepals linear-lanceolate 

 and attenuate-ac uminate : corolla purple, inch and a half long : sterile 

 filament glabrous. On cliffs of Lake Pend d'Oreille Idaho to Montana and 

 Brit. Columbia. 



P. r u pi col a. P. Newberryi var. rupicola Piper Bull. Torr. Club xxvii, 

 397. A much branched densely cespitose decumbent shrub, 3^-4 inches 

 high : pilose-puberulent below, the inflorescence glandular-viscid : leaves 

 ovate or orbicular, more or less dentate, glaucous with a persistent bloom, 

 thick, not turning black in drying, 3-5 lines long : flowers 3-6, in a rather 

 close corymb: sepals ovate, acute, ciliate-glandular, about 3 lines long : 

 corolla about inch and a half long, bright rose-crimson, naked in the throat, 

 decidedly ventricose, somewhat bilabiate, the lobes oblong, obtuse : sterile 

 filament short and glabrous. Dry cliffs, Mount Rainier Washington. 



P. Douglasii Hook. Fl. ii, 98. Stems woody and much branched at 

 base, 4-8 inches long, leaves ovate-lanceolate or ovate-oblong, 6-18 lines 

 long, entire: inflorescence glandular-pubescent, racemose, the pedicels al- 

 most all 1-flowered, usually 1-2-bracteolate : sepals ovate-lanceolate, atten- 

 uate-acuminate: corolla lilac-purple with pink base, an inch or more long, 

 tubular-funnelform and moderately bilabiate : sterile filament short and 

 slender. On rocks, interior of Oregon and Washington. 



P. Scouleri Dougl. Lindl. Bot. Reg. t. 1377, Stems woody and much 

 ^branched at base, 6-12 inches long : leaves lanceolate to linear-lanceolate, 

 acute, 1-3 inches long, sparingly and acutely serrulate: inflorescence 

 viscid-pubescent, racemose, the pedicels almost always all 1-flowered : sepals 

 ovate-lanceolate or narrower, attenuate-acuminate, corolla one and a half 

 inches long, violet-purple, tubular-funnelform and moderately bilabiate: 

 sterile filament short and slender. On rocks and mountain to'p?, interior 

 of Oregon and Washington. 



P. Cardwellii. Glabrous throughout or the inflorescence minutely 

 puberulent : stems woody at base, declined or ascending, 6-10 inches long : 

 leaves thick, not shining, lanceolate to ovate, 6-12 lines long, incisely ser- 

 rate, all narrowed at base : peduncles mostly 1-flowered and 2-bracteolate : 

 sepals narrow-lanceolate, 4-5 lines long, longer than the tube of the corolla, 

 obtuse : corolla purple, 1-1)^ inches long, tubular-funnelform, with short 

 tube, ample throat and moderately bilabiate limb; the throat woolly with- 

 in on the lower side ; upper lip of 2 rounded lobes, the lower of 3 oblong 



