158 ROSACE^E. (ROSE FAMILY.) 



9. R. hispidus, L. (RUNNING SWAMP-BLACKBERRY.) Stems slender, 

 scarcely woody, extensively procumbent, beset with small reflexed prickles ; leaflets 3 

 (or rarely pedately 5), smooth, thickish, mostly persistent, obovate, obtuse, coarsely 

 serrate, entire towards the base ; peduncles leafless, several-flowered, often bristly ; 

 flowers small. (R. obovalis, Michx. R. sempervirens and R. setosus, Bigelow.} 

 Low woods : common northward. June. Flowering shoots short, ascend- 

 ing ; sterile ones forming long runners. Fruit of few grains, red or purple, sour. 



10. R. cuneifblius, Pursh. (SAND BLACKBERRY.) Shrubby (l-3 

 high), upright, armed with stout recurved prickles ; branchlets and lower surface of 

 the leaves whitish-woolly ; leaflets 3 - 5, wedge-obovate, thickish, serrate above ; 

 peduncles 2 -4-flowered ; petals large. Sandy woods, S. New York, Penn. and 

 southward. May - July ; ripening its well-flavored black fruit in August. 



11. R. trivialis, Michx. (Low BTTSH-BLACKBERRY.) Shrubby, procum- 

 bent, bristly and prickly ; leaves evergreen, coriaceous, nearly glabrous ; leaflets 3 (or 

 pedately 5), ovate-oblong or lanceolate, sharply serrate ; peduncles 1 -3-flowered; 

 petals large. Sandy soil, Virginia and southward. March - May. 



15. ROSA, Tourn. ROSE. 



Calyx-tube urn-shaped, contracted at the mouth, becoming fleshy in fruit. 

 Petals 5, obovate or obcordate, inserted, with the many stamens, into the edge 

 of the hollow thin disk that lines the calyx-tube and within bears the numerous 

 pistils below. Ovaries hairy, becoming bony achenia in fruit. Shrubby and. 

 prickly, with odd-pinnate leaves, and stipules cohering with the petiole : stalks, 

 foliage, &c. often bearing aromatic glands. (The ancient Latin name.) 



* Styles cohering in a protruding column, as long as the stamens. 



1. R. setigera, Michx. (CLIMBING or PRAIRIE ROSE.) Stems climbing, 

 armed with stout nearly straight prickles, not bristly ; leaflets 3-5, ovate, acute, 

 sharply serrate, smooth or downy beneath ; stalks and calyx glandular ; flowers 

 corymbed ; sepals pointed ; petals deep rose-color changing to white ; fruit 

 (hip) globular. Borders of prairies and thickets, W. New York (indigenous?) 

 to Wisconsin and southwestward : also cultivated. July. The only Ameri- 

 can climbing rose, or with united protruding styles : strong shoots growing 

 10 -20 in a season. 



* * Styles separate, included in the calyx-tube : petals rose-color. 



2. R. Carolina, L. (SWAMP ROSE.) Stems tall (4 -7 high), armed 

 toith stout hooked prickles, not bristly ; leaflets 5-9, elliptical, often acute, dull 

 above and pale beneath ; stipules narrow ; flowers numerous, in corymbs ; peduncles 

 and calyx (with leaf-like appendages) glandular-bristly; fruit (hip) depressed- 

 globular, somewhat bristly. Low grounds : common. June - Sept. 



3. R. Ihcida, Ehrhart. (DWARF WILD-ROSE.) Stems (l-2high), 

 armed with unequal bristly prickles, which are mostly deciduous, the stouter per- 

 sistent ones nearly straight, slender ; leaflets 5-9, elliptical or oblong-lanceo/ate, 

 shining above, sharply serrate ; stipules broad ; peduncles 1 - 3-flowered, and with 

 the appendaged calyx-lobes glandular-bristly ; fruit depressed-globular, smooth 

 when ripe. Common in dry soil, or along the borders of swamps. May- 

 July. R. mtida, Willd., is a smooth and narrow-leaved form. 



