Bailey & Bailey: Woody Plants of National Parks 



115 



above, paler and smooth or finely hairy below; flowers large, 2 inches or more 

 across, usually borne singly, the flower-stalks and receptacles smooth; fruits 

 usually nearly globose, about 1/2 inch thick. 



Occurrence.— ISLE ROYALE, common: trail to Siskiwit Lake; Grace Island, Wash- 

 ington Harbor. 



Fig. 52. Prickly rose (Rosa acicularis). 



4. Prickly Rose (Rosa acicularis Lindl.), fig. 52. — Low shrub up to 

 about 4 feet high, or sometimes up to 6 or 8 feet, the branches armed with 

 fine straight prickles, or practically unarmed; leaflets 3 to 7, broadly elliptic 

 to oblong, 1,4 to 2 inches long, usually pointed at both ends, smooth above, 

 finely hairy and sometimes glandular below; flowers 1^/2 to 2y^ inches across, 

 usually solitary, dark rose-color, fragrant, the flower-stalks usually smooth, 

 rarely slightly glandular-hairy; outer sepals sometimes with 1 or 2 lateral 

 lobes; fruits ya to % inch thick, pear-shaped to elliptic with a distinct neck, 

 or globose without a neck. (Syns. vars. Bourgeauiana Crepin, rotunda Er- 

 lanson, and Sayiana Erianson, R. Sayi Schw.). 



Occurrence. — GLACIER, abundant at low elevations, especially on the west side: 

 Belton; Lake McDonald; Apgar Peak; North Fork Flathead River road; Swiftcur- 

 rent Lake. YELLOWSTONE: reported from roadside southwest of Nymph Springs. ROCKY 



