318 SCROPHULARIACEAE. 



Pentstemon menziesii Hook. Stems shrubby, much branched, 5—15 cm. 

 high; leaves oblong to ovate, serrulate, 0.5-2 cm. long; inflorescence a raceme 

 or narrow panicle, glandular; corolla dull purple- violet, 2-3 cm. long. 



On rocks in the mountains, above timber line, Vancouver Island, British 

 Columbia, and Washington. First collected at Nootka Sound by Menzies. 



Pentstemon menziesii davidsonii (Greene) Piper. Very similar to P. 

 menziesii, but the leaves smaller and mostly entire. 



Rocky places at about 2000 m. altitude, Washington to California. 



Pentstemon rupicola (Piper) Howell. Herbage very glaucous and some- 

 what puberulent but the inflorescence glandular; stems woody, much branched, 

 making dense mats, 8-10 cm. high; leaves firm, ovate to orbicular, dentate, 

 6-10 mm. long; sepals ovate, acute; corolla deep rose-colored, 3-4 cm. long, 

 broadened in the throat, the lobes obtuse. 



Rock cliffs in the mountains, first described from Mount Rainier. 



Pentstemon diffusus Dougl. Glabrous or nearly so; stems herbaceous, 

 erect, 30-60 cm. high; leaves ovate or oblong, serrate, 3-10 cm. long; panicle 

 leafy; corolla blue or violet, 2 cm. long, glabrous within; sterile filament hairy 

 above. 



On the banks of mountain streams, common. First found by Douglas 

 near the mouth of the Columbia River. 



Pentstemon richardsonii Dougl. Glabrous; stems from a branched woody 

 base, erect or ascending, 60-90 cm. high, often branched; leaves lanceolate 

 to ovate, mostly deeply toothed or pinnatifid, 3-8 cm. long, those on the 

 branches alternate; panicle loose, somewhat glandular; sepals ovate, acute; 

 corolla red, somewhat funnelform, 20-25 mm. long; sterile filament with a 

 few hairs near the tip. 



On dry rocky cliffs along the Columbia River. 



Pentstemon ovatus Dougl. Stems 15-30 cm. high; leaves ovate, serrate, 

 the upper ones sessile; corolla purplish-blue, 2-lipped, bearded in the throat, 

 16-20 mm. long; sterile filament bearded at the apex. 



On rocky banks and cliffs, first collected by Douglas at the Cascades of 

 the Columbia River. This species very closely resembles P. diffusus but is 

 easily distinguished by the anthers. 



Pentstemon confertus Dougl. Glabrous throughout but not glaucous; 

 stems erect, commonly 30-40 cm. high; leaves all entire, the radical oblong, 

 lanceolate or oblanceolate, acute or obtuse, 3-6 cm. long, attenuate at the 

 base into a petiole, the cauline similar, sessile, the upper often ovate, acuminate; 

 panicle strict, narrow, leafy below, 14-40 cm. long, of 2-8 whorl-like clusters; 

 flowers 6-10 mm. long; sepals glabrous, the scarious margin irregularly dentate 

 or erose, about as long as the capsule; corolla yellow or nearly white, 2-lipped; 

 lower lip bearded ; anthers dehiscing their whole length ; sterile filament bearded. 



In mountain meadows, common. Except for the color of the flowers, this 

 is indistinguishable from P. procerus Dougl. 



Pentstemon procerus Dougl. Stems 20-60 cm. or in alpine forms only 

 5-10 cm. high; basal leaves oblong or oblong-lanceolate, acute or obtuse; 

 cauline often ovate and acuminate; flowers blue, in dense whorl-like clusters; 

 corolla 8-12 mm. long. 



In mountain meadows. First collected by Douglas near Fort Vancouver, 

 Washington; the high alpine dwarfed form common on Mount Rainier was 

 named P. tolmiei by Hooker, but all possible intergrades occur. 



