Bailey sc Bailey: Woody Plants of National Parks 211 



Flowers blue to lavender-purple; sterile filament bearded or not. 



Plants j/2 to 2 feet high; leaves usually finely toothed; sterile 



filament not bearded 3. P. frulicosus. 



Plants 2 to 6 inches high; leaves mostly not toothed. 



Sterile filament not bearded; occurs at Glacier National 



Park 4. P. elUpiicus. 



Sterile filament bearded; occurs in Pacific Coast parks 



5. P. Davidsoni. 



Flowers red; sterile filament bearded. 



Leaves toothed or not toothed; occurs in California parks 



6. P. Nervberr^i. 



Leaves mostly toothed; occurs in Oregon and Washington parks 



7. P. rupicola. 



Leaves mostly narrowly oblong to spatula-shaped, % to 3 inches long; 

 sterile filament not bearded; anthers woolly or not. 



Flowers lilac-purple, broadly funnel-shaped; leaves finely toothed; 



anthers woolly 8. P. Scouleri. 



Flowers red, tubular funnel-shaped; leaves not toothed; anthers not 



woolly 9. P. Dridgesi. 



Leaves linear or awl-shaped, pointed; flowers about j/4 to % inch long; anthers not 

 woolly. 



Flowers pink or rose-color; leaves 1 to 2 inches long; sterile filament not 



bearded 10. P. ambiguus. 



Flowers blue; leaves !/4 to J/2 inch long; sterile filament bearded 



1 1 . P. Unarioides. 



1. RoTHROCK Penstemon (Penstemon Rothrocki Gray). — -Bushy 

 shrub, 1 to 2 feet high; leaves egg-shaped to oblong-egg-shaped, somewhat 

 heart-shaped at base, I/4 to % inch long, grayish with short stif? hairs, the 

 margins toothed or not toothed, often wavy; flowers dull yellow, sometimes 

 tinged with pink or purple, ^g to 1/2 inch long, borne on an unbranched stem 

 to form a spike-like flower cluster; sterile filament not bearded; anthers 

 not woolly. 



Occurrence. — SEQUOIA. 



2. Stubflower Penstemon (Penstemon brevifloms Lindl.). — Loosely 

 branched evergreen shrub, 1 to 3 feet high; leaves oblong to narrowly lance- 

 shaped, ^2 to 2 inches long, pale green, the margins finely toothed or the 

 upper scarcely toothed; flowers usually whitish with pink or purple markings, 

 about 1/2 inch long, borne in loosely branched clusters; sterile filament not 

 bearded at tip; anthers not woolly. 



Occurrence. — YOSEMITE. 



3. Bush Penstemon (Penstemon fniticosus (Pursh) Greene). — Erect 

 shrub ^2 to 2 feet high; leaves leathery, the lower spatula-shaped, or reverse- 

 egg-shaped to lance-shaped, % to 1 inch long, finely toothed, the upper 

 smaller, egg-shaped; flowers purple, about 1 to ly^ inches long; anthers 

 woolly; sterile filament not bearded. 



Occurrence. — mount rainier. 



