Bailey & Bailey : Woody Plants of National Parks 103 



Flowers usually solitary; leaves % to l^/i inches across; fruits pur- 

 plish, dryish; found in Rocky Mountain and Grand Canyon 

 National Parks 13. R. deliciosus. 



1. Hairy- FRUITED Dwarf Bramble (Rubus lasiococcus Gray).— 

 Stems slender, trailing, 1 to several feet long, rooting at the joints, with short 

 erect flowering branches; leaves 1/2 to 1 inch long, % to 2 inches across, 3- 

 to !) lobed. ' .le margins irregularly toothed; Hower white, about 1/2 inch across, 

 borne singly on slender erect stems % to 21/2 inches long; berries composed 

 of 2 to 5 druplets, red, very finely hairy. 



Occurrence. — OLYMPIC: Mount Angeles; Boulder Creek; North Fork Quinault 

 River; Low Divide, 3,600 feet. MOUNT RAINIER, common, 2,000 to 6,000 feet. CRATER 

 LAKE, common: trail to lake shore; near park headquarters. 



2. Five-leaved Dwarf Bramble (Rubus pedatus Smith) . — Similar to 

 R. lasiococcus except the leaves divided into 3 to 5 leaflets; berries red, 

 smooth and shining. 



Occurrence. — OLYMPIC, common, 1,300 to 3,000 feet: Bouldei Creek; Canyon 

 Creek; Duckabuth River; Baldy Peak; Elwha River near mouth of Godkin Creek: 

 North Fork Quinault River along trail to Low Divide. MOUNT RAINIER, common, 2,000 

 to 5,500 feet: Narada Falls. Gl-ACIER, rare: along Lake McDonald-Avalanche trail, 

 3,500 feet. 



3. Arctic Bramble (Rubus arcticus L.). — Stems slender, more or less 

 erect, up to about 8 inches high; leaves divided into 3 (or 5) leaflets, the 

 leaflets rounded at the tips, somewhat firm, glossy above, coarsely toothed; 

 petals rather large, spreading, rose-pink 



(rarely white) ; fruits similar to R. triflorus. 



Occurrence. — ISLE royale, reported from bogs ^^2[^if 



at Grace Creek. 



4. Dwarf Bramble (Rubus triflorus 

 Rich.), — Plants similar to R. pedatus, the 

 stems trailing, or ascending up to about 1 

 foot high; leaves composed of 3 (or 5) 

 leaflets; leaflets pointed at both ends, the 

 margins coarsely double-toothed, thinnish, 

 smooth; flowers 1 to 3 on slender stems, 

 the petals small, erect, white or sometimes 

 pink; berries composed of few rather large 

 juicy drupelets. 



Occurrence. — ISLE ROYALE, common in moist 

 forests: Mott Island; Washington Harbor along 

 trail to Windigo Mine. 



5. Trailing Blackberry (Rubus 

 macropetalus Dough ex Hook.), fig. 43. — 

 Trailing shrubs with stems 3 to 25 feet long 

 and very prickly with stiff curved prickles, 

 usually unbranched the first year, the nu- 



Fig. 43. Trailing blackberry 

 (Rubus macropetalus) . 



