136 Muhlenbergia, Volliine 2 



ficient to keep it distinct from P. azureus with which it has 

 been merged. 



Pentstemon azureus Benth. PI. Hartw. 327. 1849. 



No. 81 15, collected July 14, near Grass Valley, Nevada 

 county, in open moist places bordering meadows. The plant is 

 somewhat glaucous, and has lanceolate acuminate calyx lobes. 

 The type was from "in amnibus exsiccatis vallis Sacramento." 



Pentstemon roezli Regel, Act. Hort. Petrop. 2 : 326. 



No. 8019, collected June 13, on wooded slopes in the gorge 

 of the Sacramento above Shasta Springs, Siskiyou county. The 

 plants are more woody at base and taller than certain other 

 specimens, but appear to belong with this species. 



Pentstemon piliferus 



Herbaceous perennial: stems several from a tough woody 

 rootstock, 5 or 6 dm. high, glabrous, leafy: leaves glabrous, cor- 

 iaceous, the basal ones obovate or spatulate, obtuse, 6 or 7 cm. 

 long, the blade 2-2.5 c™- wide, tapering into the petiole 2 or 3 

 mm. wide which nearly equals the blade and is dilated at base; 

 lowest pair of stem leaves about i dm. long, lanceolate, some- 

 what narrower but petioled like the basal ones, the next pair 

 oblong, sessile and merely a little narrowed below, those above 

 sessile, lanceolate, gradually becoming shorter and narrower 

 until they appear as bracts in the inflorescence: thyrsus elon- 

 gated, about 2 dm. long containing about six whorls of flowers, 

 which are deep violet-blue: peduncles rather slender, i cm. long 

 or less: pedicels 5 mm. long or less: calyx when in flower about 

 6 mm. long with no proper tube, the lobes ovate-lanceolate and 

 acuminate, 3 mm. wide at base, the hyaline edges somewhat 

 uneven: corollas 3 cm. long, ventricose ampliate above, 2 cm. 

 across the slightly bilabiate top, the lobes 7 mm. long and as 

 wide: anthers with diverging cells dehiscent from base to but 

 not through the apex, the margins slightly hispid; sterile fila- 

 ment slightly dilated at the apex, where it is bearded on the in- 



