5. R. nit'ida, Willd. Low. stem and branches usually 

 thickly covered with prickles interspersed with straight 

 slender spines. Stipules mostly dilated. Leaflets bright 

 green and shining, mostly narrowly oblong. Blowers gen- 

 erally solitary. Sepals entire. — Margins of swamps, Atl. 

 Prov. 



6. R. rubiglno'sa, L. (Sweet - Bbiek.) Stem tall. 

 Prickles numerous, the larger hooked, the smaller awl- 

 shaped. Leaflets 5-7, doubly serrate, glandular beneath, 

 aromatic. Flowers mostly solitary. Fruit pear-shaped or 

 obovate. — Eoadsides and fields. 



*** Styles separate ; sepals erect and connivent after flowering, 

 persistent. 



^ Fruit globose. 



7. R. blanda. Ait. (Early Wild Eosb.)- Stem 1-3 feet 

 high. Prickles (if any) yeio and scattered, straight. Leaflets 

 5-7, mostly oblong-lanceolate, ouneate at the base, not 

 resinous, simply serrate. Sepals hispid, not lobed. Ped- 

 uncles 1-3-floiaered. — Rocks and rooky shores, mostly east- 

 ward. 



8. R. Say'i, Schwein. Stems 1-2 feet high, very prickly. 

 Leaflets 3-7, broadly elliptical to oblong-lanceolate, resinous, 

 the teeth serrulate. Flowers large, mostly solitary. Outer 

 sepals usually lobed, not hispid. — Our most northern rose. 



9. R. Arkansa'na, Porter. Stems low, very prickly. 

 Stipules narrow. Leaflets 7-11, broadly elliptical to oblong- 

 lanoeolate^wedge-shaped at the base, simply serrate, not 

 resinous. Outer sepals lobed, rarely hispid.^N.W. prairies. 



^- Fruit oblong-ovate to oblong. 



10. R. Engelman'ni, "Watson. Stems 3-4 feet high, often 

 very prickly. Leaflets 5-7, the teeth serrulate. Plowers 

 solitary. Sepals not lobed. Fruit J-1 inch long. — ^Shores 

 of Lake Superior and westward. 



15. CKAT^'GUS, L. Hawthokn. 

 1. C. coeein'ea, L. (Scaklkt - fruited Thorn.) A, low 

 tree, with reddish branches, and stout phestnut-brown 



