38 Flora of Denver. 



294. Penstemon glaber PURSH. Stems usually several 

 from the root, glaucous, corolla swollen above the tube, sterile 

 filament with a few hairs at top, leaves broad and clasping 

 Common along the Platte in sandy places. Summer. 



295. Penstemon secundiflorus BENTH. Tall, stem leaves 

 linear-lanceolate, the pairs an inch or two apart, flowers blue 

 or purplish, in a one-sided thyrse, sterile filament dilated at 

 the tip, and usually smooth. Along the Platte and Clear 

 Creek, generally in the shade of the trees. Summer. 



296. Penstemon acuminatus DOUGL. Glaucous, stem 

 leaves ovate-acuminate, clasping; flowers in an interrupted 

 thyrse, corolla lilac to a darker shade, sterile filament densely 

 bearded, curved. This grows on hillsides, Valverde, Berkeley. 

 It is earlier than the two preceding, and in bloom in May and 

 June. 



297. Penstemon caeruleus NUTT. Stems simple, erect, 

 densely flowered; corolla azure, leaves and stem glaucous, 

 leaves lanceolate and long, often somewhat keeled. Common 

 on the plains in spring. 



298. Penstemon albidus NUTT. * Viscid all over, about a 

 foot or so high, flowers whitish. Rather common on the plains. 

 Spring. 



290. Penstemon gracilis NUTT. This has serrate leaves 

 and a^ lilac corolla. Found by Miss Eaton on Clear Creek. 



300. Mimulus Ja'mesii TORE. & GRAY. Leaves far apart 

 on the long slender stems, round and often slightly reniform, 

 flowers yellow. Along the Platte and Clear Creek. Summer. 



301. Mimulus ringens L. Stems tall and erect, angled, 

 simple, flowers blue, on long stalks. Rare. Along the Platte 

 near Valverde. Summer. 



302. Veronica Americana L. Stems spreading diffusely 

 on the ground, racemes numerous in the axils of the opposite 

 leaves, corolla blue, falling soon ; pods swollen, leaves usually 



