122 ROSACE^E. (ROSE FAMILY.) 



10. R. Clincifolius, Pursh. (SAND BLACKBERRY.) Shrubby (1 -3* 

 high), ii/iright, ar/nid with stout recurved prickles ; branchlets and lower surface of 

 the leaves whitish-woolly; leaflets 3-5, wedgc-obovate, thickish, seirate above; 

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

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



11. R. trivia lis, Michx. (Low BUSH-BLACKBKRIIY.) Shrubby, pnxum- 

 Ix-nt, 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 Ttrn-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 bears the numerous pistils 

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

 by 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 column, as long as the stamens. 



1. R. setigcra, Michx. (CLIMBING or PRAIRIE ROSE.) Stems climb- 

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

 cdtove and pale 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. R. I in ida, Ehrhart. (DWARF WILD-ROSE ) Stems (l-2 high), 

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

 sistent ones nearli/ straight, slender; leajlets 5 9, elliptical or oblong-lanceolate, 

 shining above, sharply serrate; stipules broad; peduncles 1 -3-flou~erl, and -with 

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

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

 July. R. nitida, \\~illd., is a smooth and narrow-leaved form. 



4. R. bl.iiidii, Ait. (EARLY WILD-ROSE.) Nearly un.inned, or with 

 pcatti-red straight deciduous prickles (l-3 high) ; leaflets 5-7, oval or oblong, 

 olitiw, [Kile on both sidm ami minutely downy or hoary Ixneath, son-ate; stipules 

 large; flowers 1 -3, the pulnm-lm and caly.r-t.nbe smooth and glaucous; fruit glo- 

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

 Hocks and banks, Vermont to Penn. and Wisconsin, chiefly northward. May, 

 June. Petals light rose-color. 



