Enumeration of Plants of the Rocky Mountains. 253 



ard, but only a span high, as well as ( 

 Geyer's No. 154, and some of Hooker's 

 Carlton Houi 



259. Pentstemon glaber, Pursh, var. alpinus. P. alptnus, Torr. in Ann. 



pals, the particular shape of which is inconstant in the genus. Dr. Parry 

 remarks: "no doubt a variety of P. glaher, being almost exactly a 

 dwarfed representative of that elegant species ; and its alpine situation 

 would sufficiently account for its stunted size." 



260. P.glaber, Pursh, (P. erianthera, Fraser, Nutt.) "Common on 

 dry hill-sides along the valley of Clear Creek ; a splendid species, its 

 large, brilliant, inflated, blue corolla streaked with reddish-purple stains." 

 ihe name first published, with a character, ought to be restored for 

 this species ; since the anthers are but slightly hairv, in comparison 

 With those of the section Erianthera, and are frequently glabrous, ex- 

 cept a ciliation or mere denticulation at the margin of the valves. The 

 beard at the top of the sterile filament is sometimes almost wanting, 

 and sometimes sparsely extended downwards. I cannot doubt that the 

 hgure of /». speciosus in Bot. Keg., t 1270, represents this species, and, 

 returning to an old opinion in this regard, should reduce that to the 

 present species. 



261. 262. Pentstemon glaucus, Graham in Edinb. Phil. Jour. July, 

 1829, p. 348 ; Lindl. Bot. Reg. t. 1286. " Rather abundant at the foot 

 ot alpiue ridges, above the limit of trees; the taller specimens from a 

 jower elevation in the valley of Clear Creek. The more common form 

 |»as pale cream-colored flowers with greenish stripes, and pale green 

 leaves ; there is a more rare, purple-flowered variety ; both quite bila- 

 biate." Small specimens of this are found in James's collection, mixed 

 With P, Jamesii, Benth., and formerly confounded by Dr. Torrey with 

 ■^. atbidus, — to both of which they have some resemblance. The spe- 



flated corolla even than P. pubescens, with which Bentham confounded 

 It. The specific name is far from distinctive or good. 



257. Pentstemon hamilis, Nutt. in Herb. Acad. Philad. ; apparently a 

 'educed, alpine variety of P. glaucus, with shorter and rather less am- 

 Pliate corolla. Specimens collected at Eureka by Mr. Howard (in herb, 

 ^cad. Philad.) ally Dr. Parry's plant with the P. gracilis, as figured in 

 the Botanical Magazine. According to Dr. Parry it is : " the common 

 fiountain species, growing in tufts on rocky places ; flowers bright deep 

 J''Qe ; leaves glossy and bright green ; plant varying from 3 mches to a 



position of this name ■ but it is surely only a variety ot P. congests 

 ^ith purple-blue flowers. , ^ , . 



265. Pmtstemon albidus, Nutt. A common species of the plain 

 ^'Pumilus, Nutt., is perhaps an alpine state of this. But Fremont 

 specimens, referred to P. pumilus by Bentham, appear to belong to 



