158 ROSACEA. (rose family.) 



9. R. hispidus, L. (Running Swamp-Blackberry.) Stems slender, 

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

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

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

 flowers small. (R. obovalis, Michx. R. sempervirens and R. sfitbsus, 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 hirer 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 Bush-Blackberry.) Shrubby, procum- 

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

 pedately 5), ovate-oblong or lanceolate, sharpty 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, ovale, 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 south westward : 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 

 with 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. lucida, Ehrhart. (Dwarf Wild-Rose.) Stems (l°-2°high), 

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

 sistent ones nearly straight, slender ; leaflets 5 - 9, elliptical or oblong-lanceolate, 

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

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

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

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



