316 XLVm. ROSACEiE. Rosa. 



/?. obhngifolia. T. & G. (A. ovalis. Hook.) — Shrubby; Zr5. oblong-oval, mu- 

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

 obovate, thrice longer than the calyx. 



y. rotundifolia. T. & G. (Pyrus ovalis. Willd.) — Lis. broad-oval ; pet. linear- 

 oblong.— Shrub 10— 20f high. 



i. alnifolia. 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. 



StJBORDER III.— R OSACE^ PROPER. 



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



10. ROSA. 



Celtic rhos, red ; Gr. po6ov ; 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 

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

 tube of the calyx. — Shrubby and 'prickly. Leaves unequally piniiate. 

 Stipules mostly adnate to tJie petiole. 



* Native species. 



1. R. Carolina. (R. Caroliniana. Bw.) 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 ; Jls. corymbose ; fr. 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 obcordate, 

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



2. R. LUCiDA. Ehrh. (R. Caroliniana. Mr. not Bw.) Shining or Wild Rose. 

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



Ifis. 5—9, elliptical, imbricate, simply serrate, smooth and shining above ; peti- 

 oles glabrous or subhispid; Jls. generally in pairs (1 — 3) ; f/\ depressed-globose, 

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

 thickets throughout the U. S., slender, \vith 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. 



/?. T. & G. (R. parviflora. Ehrh.) — Lfts. ova , mostly very obtuse, paler be- 

 neath ; petioles smooth or pubescent. 



3. R. NiTiDA. Willd. Shining ar Wild Rose. 



St. low, densel}^ armed with straight, slender, reddish prickles ; lfts. 5 — 9, 

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

 reaching to the lower leaflets ; jls. solitary ; cal. hispid; fr. globose. — In swamps, 

 N. Eng. States. Stems 1 — 2f high, reddish from its dense armor of prickles. 

 Leaflets 1 — H' long, \ as wide, subsessile, odd one petiolulate. Stipules 5 — 8" 

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

 scarlet. Jn. 



4. R. BLANDA. Ait. TR. gemella. Linn.) Bland Rose. 



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

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

 the veins beneath, petiole unarmed; s^/>. dilated ; /.s. mostly in pairs (1 — 3); 

 fr. globo-se, smooth, as well as the short pedimcles. — 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. rubilblia. 7?. i?r.) Michigan or Prairie Rose. 

 Branches elongated, ascending, glabrous; spines few, strong, stipular ; lfts. 



