GENUS 28. 



ROSE FAMILY. 



279 



10. Rubus canadensis L. Millspaugh's Black- 

 berry. Fig. 2297. 



Rubus canadensis L. Sp. PI. 494. 1753. 

 Rubus Millspaughii Britton, Bull. Torr. Club 18 : 366. 

 1891. 



Ascending, wand-like, entirely unarmed, or with 

 a few weak prickles, glabrous or the younger shoots 

 scurfy-pubescent, the stems 5-i2 long. Leaves 

 long-petioled, pedately 5-foliolate, or some 3-folio- 

 late; leaflets oval, thin, glabrous on both sides, long- 

 acuminate or acute, rounded or narrowed at the base, 

 often 6' long and 2' wide, sharply but not very deeply 

 dentate; stalk of the terminal leaflet ii'~4' long; 

 inflorescence loosely racemose; bracts linear-lanceo- 

 late; pedicels slender, ascending; sepals lanceolate, 

 acuminate ; fruit black, very pulpy, 8"-i2" long. 



In thickets and woods, Newfoundland to Michigan, and 

 the higher Alleghanies of North Carolina. June-Aug. 



ii. Rubus nigricans Rydb. Bristly Black- 

 berry. Fig. 2298. 



Rubus hispidus var. suberecta Peck, Rep. N. Y. State 

 Mus. 44: 31. 1891. Not R. suberectus Anders. 

 1815. 



Rubus nigricans Rydb. in Britton, Man. 498. 1901. 



Stems erect or ascending, 2-4 high, the older 

 parts densely clothed with slender stiff slightly 

 reflexed bristles. Leaflets generally 5 in leaves 

 of the sterile shoots, 3 in those of the flowering 

 branches, obovate, mostly acute or short-acumi- 

 nate, sometimes 4' long, short-stalked or sessile, 

 green and glabrous on both sides ; flowers 6"-o/' 

 broad, racemose ; fruit small, sour. 



In dry or marshy soil, Quebec and northern New 

 York to Michigan and eastern Pennsylvania. In- 

 cluded in our first edition under Rubus setosus Bigel., 

 which appears to be a hybrid between this species 

 and R. hispidus L. July-Aug. 



12. Rubus frondosus Bigel. Leafy-flow- 

 ered Blackberry. Fig. 2299. 



Rubus frondosus Bigel. Fl. Bost. Ed. 2, 199. 1824. 



Rubus villosus frondosus Bigel. ; Torr. Fl. U. S. i : 

 487. 1824. 



Stems erect or arching, 2i-4 high, angled, 

 bearing rather stout straight prickles, villous, 

 especially when young. Leaves velvety-pubescent 

 beneath, sparingly pubescent or glabrous above ; 

 leaflets elliptic to obovate, sharply serrate, acute 

 or acuminate ; racemes more or less elongated, 

 the pedicels subtended by petioled, mostly uni- 

 foliolate leaves (bracts) ; flowers about i' broad; 

 petals broadly obovate ; fruit subglobose, black, 

 falling away before the subtending leaves. 



Mostly in dry soil, Massachusetts to New York, 

 Ohio(?) and Virginia. May-June. 



