BOSACEAE. 173 



Sm.), Greenwood near Media (Te.), Chester (W. Tr.). C/iester— West 

 Chester (He.), Westtown, South Valley Hill near Malvern (Le.). Lan- 

 caster — York Furnace (Ja.) (Li.). Berks — Wernersville (Te.), Reading 

 (Wn.). Le/ii^rfo— Deily's (Kr.). Northavipton—CP.). Dauphin — Pax- 

 tang (Mar.). 



New Castle — Naaman's Creek, Rockford, Wooddale, Mount Cuba. 



4. RUBUS L. Raspberry. Blackberry. Bramble. 



Leaves simple, crenate, or palmately lobed. 1. E. odoratus. 



Leaves 3-7 foliolate. 



Fruit falling away from the dry receptacle. Raspberries. 



Herbaceous, usually unarmed, 1-3 flowered; leaves not white be- 

 neath. 2. E. Americanus. 

 Shrubby; many-flowered; leaves white-pubescent beneath. 



3. B. occidentalis. 

 Fruit persistent on the fleshy receptacle. Blackberries and dewberries. 

 Erect, recurved or ascending; fruit black. 



Leaflets laciniate or deeply incised. 4. E. liciniatus. 



Leaflets serrate or slightly incised. 



Leaves white-woolly beneath. 5. E. cuneifolius. 



Leaves not /white-woolly beneath. 



Inflorescence distinctly glandular. 

 » . Fruit broadly oval or nearly spherical, very 



pulpy. 6. E. nigrohaccus. 



Fruit narrowly oblong or thimble-shaped. 



7. E. Allegheniensis. 

 Inflorescence and leaves decidedly villous, scarcely 



glandular. 

 Terminal leaflet one-half longer than the lateral 

 ones, oblong to oblong-ovate. 

 , 8. B. ostryifolius. 



Terminal leaflet slightly larger than the lateral 

 ones, obovate or rhombic obovate. 



9. E. frondosus. 

 Inflorescence slightly villous. 



Plant low, almost herbaceous, weakly, prickly. 



10. E. Bandii. 

 Plant tall and shrubby. 11. E. argutus. 

 Trailing or decumbent. 



Stem prickly; fruit black. 



Inflorescence usually many-flowered. 



Terminal leaflet one-half longer than the lateral 

 ones, oblong or oblong-ovate, acute. 



8. E. ostryifolius. 

 Terminal leaflet only slightly longer than the lat- 

 eral ones, ovate, acuminate. 



12. E. procumbens. 

 Inflorescence usually 1-2-flowered. 



Leaflets cuneate at the base ; glabrous. 



13. 7?. suhuni-fiorus. 

 Leaflets rounded or cordate at the base, pubescent 



beneath. 14. E. Baileyanus. 



Stem bristly or weakly prickly; fruit red or, when ripe, 

 almost black. 

 Leaflets thick ; inflorescence stout, strongly bristly or 



weakly prickly. 15. B. nigricans. 



Leaflets thin ; inflorescence sparingly and weakly 

 bristly. 16. B.'hispidus. 



