Rydberg : Rocky Mountain flora 37 



This species is related to C. Imtta and C. rhexifolia. From 

 the former it differs in the broad leaves and dense pubescence, and 

 from the latter in the small size of both the plant and the flower, 

 the thick leaves and more copious pubescence. 



Utah: Head of American Fork Cafion, 18S5, F. E. Leonard 

 iji in part (type) ; mountains around the south fork of Big Cot- 

 tonwood Creek, 1905, Rydberg & Carlton 6^g2. 



Castilleja humilis 



Perennial, with a short woody caudex ; stems several, about 

 2 dm. high, glabrous below, somewhat viscid-pubescent above ; 

 leaves oblong to elliptic-lanceolate or the uppermost ovate, 2-3 

 cm. long, obtuse or acute, finely puberulent; bracts entire, obovate, 

 tipped with dark crimson, a little shorter than the corollas ; inflor- 

 escence short and dense; calyx densely puberulent, 10-12 mm. 

 long, equally cleft above and below, its lobes ovate, obtuse, about 

 1.5 mm. long; corolla about 15 mm. long, densely puberulent, 

 greenish with purple margins ; galea 7—8 mm. long ; lip 2 mm. 

 long, its lobes lanceolate, acuminate. 



In habit this species most resembles C. rhexifolia, but the 

 plant is much smaller and the corolla of about half the size. It 

 grows in alpine woods. 



Wyoming: Medicine Bow Mountains, Albany County, 1900, 

 Aveti Nelson ygig. 



Castilleja variabilis 



Perennial with a rootstock ; stems usually single, more or less 

 pubescent, 4-8 dm. high ; leaves linear-lanceolate or lanceolate, 

 4-6 cm. long, 3-ribbed, puberulent and more or less short-hirsute, 

 rarely glabrous ; bracts lanceolate, deeply 3-cleft, greenish at the 

 base, otherwise yellow with scarlet or brick-red tips or sometimes 

 almost wholly brick-red; calyx viscid-villous, about 2.5 cm. long, 

 tinged with yellow ; corolla yellowish-green with scarlet or yellow 

 margin, about 4 cm. long; galea nearly 2 cm. long; lip dark- 

 green, 3 mm. long, with lanceolate lobes. 



This species somewhat resembles C. lanceolata, but has larger 

 flowers and differently colored bracts. These are nearly of the 

 same color as those of C. Intescens and C. desertornin, but both of 

 these species have smaller flowers and 3-cleft upper leaves. C. 

 variabilis grows in mountain valleys and on hillsides, at an altitude 

 of 2500-3000 m. 



Utah : Big Cottonwood Canon, below Sih^er Lake, 1905, 



