Pe Se ee ee 
Studies on the Rocky Mountain flora—XVIl 
Per AXEL RYDBERG 
’ Pedicularis siifolia 
Perennial with a rootstock; stem glabrous, 3-6 dm. high, 
leafy ; leaves pinnately divided to the midrib, glabrous, 5-F5 cm. 
long ; divisions lanceolate, narrowed at the base, t—4 cm. long, 
more or less doubly serrate-dentate ; spike short, 3-8 cm. long ; 
bracts linear, oblong, or lanceolate,¢ entire. or slightly toothed ; 
calyx glabrous or with a few scatféred hairs, 8-9 mm. long, its 
lobes lanceolate ; corolla yellowish, nearly 2 cm. long; galea 
about 8 mm. long, curved, upper portion helmet-shaped with a 
short conical beak ; lip 4 mm. long, rather deeply 3-cleft with 
rounded lobes. - 
This species is somewhat intermediate between P. Candyi and 
P. bracteosa. In habit it resembles closely the latter, but the 
corolla is that of the former, having an evident although short 
beak. It grows in the mountains of western Montana and Idaho 
at an altitude of 600-1200 m. 
Montana: Grant Creek, June 7, 1897, JZ. /. Elrod and assist- 
ants 97. iP 
Adenostegia ciliosa 
Annual; stem more or less branched, puberulent, purplish, 
1.5-2 dm. high; leaves 2-3 cm. long, finely puberulent, 3-5- 
cleft into filiform divisions; flowers in small headlike clusters ; 
racts similar to the leaves but with broader bases and more or 
or less hirsute-ciliate with’ white flat hairs; calyx nearly 1.5 cm. 
long, more or less ciliate; its divisions about 5-ribbed ; corolla 
about 15 mm. long; galea 5-6 mm. long, hooded at the apex ; 
lip nearly as long, pubescent without; stamens 4, anthers 2- 
celled, sparingly short-bearded. 
This species is probably most closely related to A. ramosa 
Nutt., but is easily distinguished by the ciliate bracts and calyces. 
It grows on dry mesas at an altitude of about 2000 m. 
Wyominc : Spread Creek, 1897, Frank Tweedy 545- 
| ’ Castilleja arcuata | 
Perennial, more or less tufted at the base; stems erect, stric ie 
usually simple, 2-4 dm. high, shining, yellow or tinged with 
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