122 ROSACEA. (rose family.) 



10. R. CHaaeifoIius, Pursh. (Sand Blackberry.) Shrubby (1° -3° 

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

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

 peduncles 2-4-flowered ; petals large. — Sandy woods, S. New York to Virginia 

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



11. R. trivifaSis, Michx. (Low Bush-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-flow- 

 ered; 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 obeordate, inserted, with the many stamens, into the edge 

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

 over its inner surface. Ovaries hairy, becoming bony aehenia in fruit. — Shrub- 

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

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



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



1. R. setigera, Michx. (Climbiko or Prairie Rose.) Stems climb- 

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

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

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

 globular. — Borders of prairies and thickets, Ohio to Illinois and southward. 

 July. — A fine species, the only .American climbing Rose ; the strong shoots 

 growing 10° -20° in a season. 



* * Styles separate, nearly 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 pal beneath; stipules narrow ; flowers numerous, in corymbs; calyx and 

 peduncles glandular-bristly, the former with leaf-like appendages; fruit (hip) 

 depressed-globular, somewhat bristly. — Low grounds, common. June -Sept. 



3. 11. 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, 

 s/iiiiing 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. — 11. nitida, WilhL, is a smooth and narrow-leaved form. 



4. R. I)Msa«la, Ait. (Early Wild-Rose.) Nearly unarmed, or with 

 scattered straight deciduous prickles (l°-3° high); leaflets 5-7, oral or oblong, 

 obtuse, pede on both sides and minutely downy or hoary beneath, serrate; .stipules 

 large; flowers 1 -3, the peduncles and calyx-tube smooth and glaucous ; fruit glo- 

 bose, crowned with the persistent erect and connivent entire calyx-lobes. — 

 Rocks and banks, Vermont to Penn. and Wisconsin, chiefly north v ard. May. 

 June. — Petals light rose-color. 



