ROSE FAMILY 123 
straightish prickles below. Leaves petioled, of 3-7 ovate leaflets which 
are acute, irregularly serrate, soft-hairy beneath. Flowers racemed, 
the lower ones leafy-bracted. Petals white, obovate, much longer 
than the taper-pointed sepals. Fruit lony, of small drupelets. Common 
in thickets.* 
6. R. cuneifolius Pursh. Sanp BuiackBerry. Stem shrubby, 
erect or diffuse, 2-3 ft. high; prickles straight or recurved. Leaves 
petioled, 38—5-foliate ; leaflets obovate, serrate towards the apex, 
wedge-shaped towards the base, rough above, white downy-woolly 
beneath. Racemes mainly terminal, few-flowered. Petals white, 
longer than the sepals. Fruit ovoid, black, smaller than the preced- 
ing. Common in old fields.* 
7. R. hispidus L. Runxixc Swamp Biackserry. Stem trailing 
or prostrate, often several feet in length, armed with recurved 
prickles. Leaves petioled, mostly of 3 leaflets; leaflets obovate, 
obtuse, thick, dark green and shining above. Flowering branches 
commonly erect, few-flowered, flowers white. Fruit small, reddish, 
turning nearly black. In swamps and low ground. 
8. R. villosus Ait. Low BLAackBERRY, DrwBERRY. Stems 
shrubby, trailing widely. 3-10 ft. long. somewhat prickly. Leaflets 
usually 3, but sometimes 5 or 7, ovate, acute, sharply (and doubly) 
cut-serrate, thin. Racemes upright on the short branches, 1-3-flow- 
ered. Fruit roundish, of fewer and larger grains than No. 5, very 
sweet when fully ripe. Common N., in stony or gravelly fields. 
XII. ROSA L. 
Erect running or climbing prickly shrubs. Leaves pinnate, 
leaflets serrate, stipules united to the petiole. Calyx tube urn- 
shaped, with a rather narrow mouth. Petals (in single roses) 5. 
Stamens many, inserted around the inside of the mouth of the 
calyx tube. Ovaries many, hairy, ripening into bony akenes, 
inclosed in the rather fleshy and sometimes eatable calyx tube. 
1. R. pratincola Greene. Stems densely prickly, 1-2 ft. high. 
Stipules narrow. usually with glandular teeth or a fringe of glandu- 
lar hairs toward the tip; leaflets 7-11, varying from elliptical to 
nearly obovate, obtuse at the tip. narrowed at the base, simply 
toothed or serrate. rather firm and distinctly veined. Flowers usually 
in corymbs ; sepals lanceolate, taper-pointed. Fruit globose, smooth. 
Prairies, especially W. 
2. R.blanda Ait. Earty Witp Rose. Stems 1-3 ft. high. usually 
without prickles; stipules broad. Flowers generally large, corymbed 
or solitary; sepals after flowering closing over the mouth of the calyx 
tube and persistent. Rocks and rocky shores. 
