RYDBERG: Rocky MOUNTAIN FLORA St 
This species is related to C. dauta 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. 
Uran: Head of American Fork Cafion, 1885, 7. £. Leonard 
151 in part (type); mountains around the south fork of Big Cot- 
tonwood Creek, 1905, Rydberg & Carlton 6592. 
Castilleja humilis 
Perennial, with a short woody caudex; stems several, about 
2dm. 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. 
Wyominc: Medicine Bow Mountains, Albany County, 1900, 
Aven Nelson 7919. 
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 
, 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- 
sreen, 3 mm. long, with lanceolate lobes. 
This species somewhat resembles C. lanceolata, but has larger 
flowers and differently colored bracts. These are near ly of the 
Same color as those of C. /utescens and C. desertorum, but both of 
these species have smaller flowers and 3-cleft upper leaves. C. 
Yartabilis grows in mountain valleys and on hillsides, at an altitude 
of 2500-3000 m. 
 Uran: Big Cottonwood Cafion, below Silver Lake, 1905, 
