MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 37 1 



Symphoricarpos occidentalis Hook. Fl. Bor. Am. i : 285 [111. FI. 



3: 236; Syn. Fl. I-: 13; Man. R. M. 125]. 



In open valleys, up to an altitude of 2200 m. 



Montana : Helena, 1889 and 1890, F. D. Kelsey ; Madison Co., 

 1886, Tzvccdy, 1086; Lewis and Clarke Co., Mis. E. Miith : West 

 Gallatin River, 1892, W. T. Shazv ; Wolf Creek, July 24, 1897, 

 Rydberg ci- Bessey, joij; Forks of the Madison, July 26, 3016; 

 Snowy Mountain, 1882, Caiiby ; Horned Creek, 1883, Scrihncr, 67. 



Yellowstone Park: Mammoth Hot Springs, 1884, Tweedy; 

 1885, 788. 



* Symphoricarpos vaccinioides. 



Symfhoricarpos montanus Wats. King's Exped. 5: 132, in part; 



not H.B.K. S. rotundifoliiis Gray, Syn. Fl. i- : 14, in part. 



A densely and intricately branched shrub, 5-8 dm. high ; bark of the 

 older stems dark grayish brown and shreddv, that of the youno- 

 branches very light yellowish brown and shining; leaves about 2 cm. 

 long, oval, acute at both ends, dark green above, more or less glau- 

 cous beneath, puberulent or glabrate ; corolla elongated-campanu- 

 late or cylindric-funnelform, 6-8 mm. long and 3-4 mm. in diameter, 

 the lobes rounded, merely spreading ; berr}' white, about i cm. long 

 and 7 mm. in diameter, ellipsoid; seeds about 5 mm. long, slightly 

 acutish at the lower end. 



S. vaccinioides is intermediate between S. orcophihis and S. 

 7-otiindifoliiis. It resembles most the former in the foliage and the 

 seeds, but the latter in the flowers ; in the herbaria it is found un- 

 der both names. Glabrate specimens in fruit are \^x\ hard to dis- 

 tinguish from those of S. orcophilus,h-a\. the calyx-lobes are shorter; 

 in flower, however, the two are readily separated, as the corolla of 

 S. vaccinioides is scarcely more than half as long as that of S. 

 oreophilus. S. rotundifoliiis differs from both in the round or broadly 

 ovate obtuse densely hairy leaves. Probably all the specimens 

 from the northern Rockies, referred to either S. oreophilus or S. ro- 

 tundiJ~olius, belong to S. vaccinioides : at least that is the case with 

 all found in the Herbarium of Columbia University. The following 

 specimens belong to this species : 



Montana: Lima, 18^^, Rvdderg, 2 7pj ; Forks of the Madison, 

 July 24, 1897, Rydberg & Bessey, J017 (type) ; Indian Creek, 

 July 22, jOi8 ; German Gulch, 1889, R. W. Traphagen. 



Yellowstone Park : Electric Peak, August 18 and 20, 1897, 

 Rydberg & Bessey, joig and j020. 



