46 XLVIII. ROSACES. ROSA. 



/?. oblongifolia. T. & G. (A. ovalis. Hook.} Shrubby ; Ivs. oblong-oval, mu- 

 cronate, and with small, sharp serratures ; roc. and fls. smaller ; pet. oblong- 

 obovate, thrice longer than the calyx. 



y. rotundifolia. T. &G. (Pyrus ovalis. WiUd.)Las. broad-oval; pet. linear- 

 oblong. Shrub 10 20f high. 



S. almfolia. T. & G. (Aronia alnifolia. Nutt.) Shrubby or arborescent ; Ivs. 

 orbicular-oval, rounded or retuse at each end, serrate only near the apex ; pet. 

 linear-oblong; sta. very short. 



SUBORDER III. R OSACE^E PROPER. 



Ovaries solitary or several, distinct ; fruit achenia or follicular. 

 10. ROSA. 



Celtic rhos, red ; Gr. pojov ; Lat. rosa; Eng. rose. 



Calyx tube urceolate, fleshy, contracted at the orifice, limb 5-cleft, 

 the segments somewhat imbricated in aestivation, and mostly with a 

 leafy appendage ; petals 5, (greatly multiplied by culture) ; achenia 

 90, bony, hispid, included in and attached to the inside of the fleshy 

 tube of the calyx. Shrubby and prickly. Leaves unequally pinnate. 

 Stipules mostly adnate to the petiole. 



* Native species. 



1. R. CAROLINA. (R. Caroliniana. Biv.} Carolina Rose. Swamp Rose. 

 St. glabrous, with uncinate, stipular prickles; Ifts. 5 9, oblong-lanceolate 



or elliptical, acute, sharply serrate, glaucous beneath, not shining above, peti- 

 oles hairy or subaculeate ; fls. corymbose ; jr. depressed-globose, and with the 

 peduncles hispid. A prickly (not hispid) shrub, in swamps and damp woods, 

 Can. and U. S., 4 8f high, erect and bushy, with reddish branches. Prickles 

 mostly 2 at the base of the stipules. Leaflets 1 2' long, | as wide, rather vari- 

 able in form. Flowers in a .sort of leafy corymb of 3 7. Petals cbcordate, 

 large, varying between red and white. Fruit dark red. Jn. Jl. 



2. R. LUCIDA. Ehrh. (R. Caroliniana. MX. notjftw?.) Shining or Wild Rose. 

 St. armed with scattered,* setaceous prickles, those of the stipules straight; 



Ifls. 59, elliptical, imbricate, simply serrate, smooth and shining above ; peti- 

 oles glabrous or subhispid; fls. generally in pairs (1 3); Jr. depressed-globose, 

 and with the peduncles, glandular hispid. Shrub 1 3f high, in dry woods or 

 thickets throughout the U. S., slender, with greenish branches. Leaflets 1 If 

 long, as wide, acute or obtuse, odd one petiolate, the others sessile. Sepals 

 often appendiculate, as long as the large, obcordate, pale red petals. Fruit 

 small, red. Jn. Jl. 



0. T. & G. (R. parviflora. Ehrh.'] Lfts. ova , mostly very obtuse, paler be- 

 neath ; petioles smooth or pubescent. 



3. R. NITIDA. Willd. Shining or Wild Rose. 



St. low, densely armed with straight, slender, reddish prickles ; Ifts. 59, 

 narrow-lanceolate, smooth and shining, sharply serrate ; slip, narrow, often 



long, adnate to the petiole, each side. Flowers with red, obcordate petals. Fruit 

 scarlet. Jn. 



4. R. ELANDA. Ait. (R. gemella. Linn.') Bland Rose. 



Taller ; st. armed with scattered, straight, deciduous prickles ; Ifts. 5 7, 

 oblong, obtuse, serrate, smooth, but not shining above, paler and pubescent on 

 the veins beneath, petiole unarmed ; stip. dilated ; fls. mostly in pairs (1 3) ; 

 fr. globose, smooth, as well as the short -peduncles. Shrub found on dry, sunny 

 hills, Northern and Middle States. Stems 2 3f high, with reddish bark 

 Flowers rather large. Sepals entire, shorter than the reddish, emarginate petals. 

 Bracts large, downy. Jn. 



5. R. SETIGERA. Michx. (R. rubifolia. R. Br.} Michigan or Prairie Rose. 

 Branches elongated, ascending, glabrous ; spines few, strong, stipular ; Ifts 



