216 



American Midland Naturalist Monograph No. 4 



Fig. 129. Roundleaf snowberry 

 {Syimpboricarpos rotundlfolius) . 



Fig. 128. Washington snowberry 

 {S^mphoricarpos hesperim) . 



Jones), fig. 128, with thinnish oval 

 pointed leaves and nearly smooth 

 twigs, is the form found in the 

 Northwest, at Olympic and Mount 

 Rainier National Parks. Sharpleaf 

 snowberry (S. acutus (Gray) Dieck), with densely hairy twigs and leaves, 

 occurs in the southern Cascades and Sierra Nevada parks from Crater Lake 

 south to Kings Canyon. S. mollis is a CaUfomia form with firm roundish- 

 oval leaves not pointed at the tips. 



Occurrence. — OLYMPIC: trail to Constance Ridge. MOUNT RAINIER: Longmire; Nis- 

 qually Valley; Mount Wow; White River, near old camp. CRATER LAKE: south 

 entrance to park; Trapper Creek. LASSEN: Lassen Peak. YOSEMITE, common, 4,000 to 

 8,500 feet: Yosemite Valley; Ledge trail; Pohono trail; Gray Creek; Crane Flat 

 road north of Merced Grove; Muir Gorge. KINGS CANYON: near Sphinx Creek. 

 SEQUOIA, 5,000 to 7,000 feet: Black Rock Pass; head of Bennett Creek; near Colony 

 Mill. 



3. Roundleaf Snowberry {Symphoricarpos rotundlfolius Gray), fig. 

 129. — Spreading shrubs 1 to 4 feet high, the stems sometimes nearly pros- 

 trate; leaves smooth or hairy, oblong to elliptic, broadly oval, or egg-shaped, 

 i^ to 1 inch long, those of sterile shoots sometimes rounded and few-toothed; 

 flowers y^ to i^ inch long, the corolla narrowly bell-shaped, white with a 

 pinkish or yellowish tinge, hairy on the inside or in some forms smooth, with 

 5 glandular areas at the base; styles smooth; berries waxy-white, globose or 

 oblong. 



As considered here, this species is very variable. Jones in his monograph 



