(i42 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 

 5. pterocaitlon ; 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. nodiflorum 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 1383 (type). 



Kansas: Reno County, 1897, Hitchcock 36 2 -a. 



Colorado : Near Boulder, 1902, Tweedy 5236 ; Timnath, 

 1899, Osterhout ; along Platte River, Denver, 1878, M. E. Jones 

 603; Canon City, 1896, Shear 3777 ; Bent's Fort, 1846, Lt. 

 Abert. 



Arizona: Chiricehun Mountains, 1894, Tourney. 



New Mexico: Mesilla, Dona Ana County, 1898, Wooton 30. 



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. 



Colorado: Mancos, 1898, Baker, Earle c c r Tracy j6 (type); 

 Gray-Back Mining Camp, 1900, Rydberg & Vreeland 3630; 

 Arboles, 1 899, Baker 602. 



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-IO mm. long; lobes lanceolate, long-acuminate with 

 toothed scarious auriculate sides ; corolla funnelform, more or less 

 gibbous, bluish purple, 12-15 mm - vvidc at tnc mouth ; lower lip 



