642 RYDBERG: Rocky MOUNTAIN FLORA 
Dunal in De Candolle’s Prodromus ; but our plant does not agree 
with the description of any of these, except perhaps that of 
S. plerocaulon ; a specimen of the latter cited by Dunal is in the 
herbarium of Columbia University, and this shows that it is more 
closely related to S. xodiflorum than to S. nigrum. 
‘S. interius grows in river valleys and on sandy soil among 
bushes at an altitude of 600-1800 m. 
NEBRASKA: On Middle Loup River, near Mullen, 1893, Ryd- 
berg 1385 (type). 
Kansas: Reno County, 1897, Hitchcock 362-a. 
Cororapo: Near Boulder, 1902, Zweedy 5236, Timnath, 
1899, Osterhout ; along Platte River, Denver, 1878, M/Z. E. Jones 
605; Cation City, 1896, Shear 3777; Bent’s Fort, 1846, Lé. 
Abert. 
Arizona: Chiricehun Mountains, 1894, Zoumey. 
New Mexico: Mesilla, Dona Ana County, 1898, Wooton 50. 
/ 
“Pentstemon strictiformis sp. nov. 
Perennial with a woody caudex ; stems 3—5 dm. high, glabrous 
and strict, simple; basal leaves petioled, 5-10 cm. long ; blades 
oblanceolate, obtuse, glabrous and slightly glaucous; stem- 
leaves sessile, lanceolate, acuminate, 4-8 cm. long ; inflorescence 
more or less secund; calyx-lobes lanceolate, acuminate, 8-10 
mm. long, more or less scarious and dentate on the margin; 
corolla violet-purple, funnelform, somewhat gibbous, about 2.5 
cm. long and limb nearly 2 cm. wide; anthers long-villous with 
white hairs ; sterile stamen villous with yellow hairs. 
This is closely related to P. strictus, but differs mainly in the 
long-acuminate sepals. It grows up to an altitude of 2800 m. 
Cotorapo: Mancos, 1898, Baker, Earle & Tracy 76 (type); 
Gray-Back Mining Camp, 1900, Rydberg & Vreeland 5630; 
Arboles, 1899, Baker 602. 
v Pentstemon oreophilus sp. nov. 
Perennial branched at the base, perfectly glabrous throughout, 
2-4 dm. high; basal leaves oblanceolate, obtuse, short-petioled ; 
stem-leaves lanceolate and sessile, 5-10 cm. long, acute or acu- 
minate ; inflorescence dense and usually more or less one-sided, 
calyx 8-10 mm. long; lobes lanceolate, long-acuminate with 
toothed scarious auriculate sides ; corolla funnelform, more or less 
gibbous, bluish purple, 12-15 mm. wide at the mouth; lower lip 
