204 



ROSACEAE. 



[VOL. II. 



14. Rubus setosus Bigel. Bristly 

 Blackberry. (Fig. 1903.) 



Rubus setosus Bigel. Fl. Host. Ed. 2, 198. 1824. 

 Kit bus hisfiidus var. setosus T. & G. Fl. N. A. i: 



456. 1840. 

 Rubus hispidus var. suberecla Peck, Rep. N. Y. 



State Mus. 44: 31. 1891. Not R. stiberectus 



Anders. 1815. 



Similar to the preceding species but stouter, 

 stems ascending or decumbent, the older parts 

 densely clothed with slender stiff slightly re- 

 flexed 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; 

 flowers 6"-9 // broad, racemose; fruit small, sour. 



In dry or marshy soil, Quebec and northern New 

 York to eastern Pennsylvania. July-Aug. 



15. Rubus trivialis Michx. Low Bush- 

 Blackberry. (Fig. 1904.) 



Rubus trivialis Michx. Fl. Bor. Am. i: 296. 1803. 



Stem trailing or procumbent, several feet long, 

 beset with stout hooked prickles, and sometimes 

 bristly. Branches erect, $'-<)' high, prickly and 

 usually pubescent or setose; leaves petioled, 3- 

 foliolate (rarely 5-foliolate), leaflets oval, or 

 sometimes ovate lanceolate, coriaceous, ever- 

 green, glabrous or very nearly so, acute or ob- 

 tusish at the apex, narrowed or rounded at the 

 base, sharply serrate; peduncles terminal, prickly, 

 i-5-flowered; flowers often i' broad, white; 

 petals much exceeding the reflexed sepals; fruit 

 black, often i' long, well flavored. 



In dry sandy soil, Virginia to Florida, west to Mi- 

 souri and Texas. Called also Southern Dewberry. 

 March-May. 



16. Rubus Baileyanus Britton. Bailey's 

 Blackberry. (Fig. 1905.) 



Rubus villosus var. humifusus T. & G. Fl. N. A. x: 

 455. 1840. Not R. humifusus Weihe, 1825. 



Rubus ini'iaus Britton, Bull. Torr. Club, 20: 279. 

 1893. Not R. Canadensis var. invisus Bailey, iSgr. 



R. Baitya nits Britton, Mem. Torr. Club, 5: 185. 1894. 



Rubus -'illosus Randii Bailey; Redf. & Rand, Fl. 

 Ml. Desert, 94. 1894. 



Intermediate in habit between R. villosus and 

 R. Canadensis, stem trailing or ascending, spar- 

 ingly prickly, 3-6 long. Leaflets broadly 

 ovate or oval, pubescent, at least on the lower 

 surface, mostly rounded or cordate at the base, 

 acute or obtuse, the uppermost leaves almost in- 

 variably unifoliolate; flowers few, rather large; 

 fruit small, not as succulent as that of the related 

 species. 



In dry woods and thickets, Maine to southern New 

 York and Virginia. May-June. 



