SAND BLACKBERRY 327 



Var. Randii, Bailey. 



"Low and diffuse, 1°-2X° (3-8 decimeters) high, the canes 

 bearing very few and weak prickles, or often entirely unarmed, 

 very slender and soft, sometimes appearing as if nearly herba- 

 ceous; leaves very thin and nearly, or quite smooth beneath and 

 on the petioles, the teeth rather coarse and unequal ; cluster stout, 

 with one or two simple leaves in its base, not villous, and very 

 slightly if at all pubescent; flowers half or less the size of those 

 of R. nigrohaccus ; fruit small, dry and seedy." 



Original distribution. — Woods, Mt. Desert, Me., New Bruns- 

 wick and Lake Superior, 



25. R. Canadensis, L. Thornless or Mountain Blackberry. R. 



MiUspaughii, Britton. 



Stems upright, 3-10 feet (1-3 meters) high, more or less 

 deeply grooved, reddish brown, perfectly smooth and unarmed, 

 except for a few weak prickles toward the top and on the smaller 

 branches, petioles and mid-veins; branches and petioles of the 

 young canes glabrous, those of the flowering canes, together 

 with the pedicels, pubescent, but not glandular; leaflets of young 

 canes 5, the three uppermost with long and slender leaf- stalks, 

 glabrous above and beneath, narrowly ovate, mostly rounded at 

 base, long-acuminate, leaflets of bearing canes 3, glabrate, often 

 broader, more deeply and coarsely serrate and less acuminate; 

 stipules of young canes very long and slender, scarious ; inflores- 

 cence racemose, pedicels oblique, the lower ones axillary, the 

 upper subtended by foliaeeous bracts, X inch or more in length; 

 sepals broadly ovate, whitened-downy within, acumination short; 

 fruit ripening late, roundish, jet black, with large and promi- 

 nent di'upelets and a rather hard core, sour and sometimes even 

 bitterish, at least until very ripe. 



Found in mountainous parts of the Atlantic states, but con- 

 fined chiefly to high elevations, especially southward. Usually 

 abundant wherever it occurs. 



The species often crosses with R. nigrohaccus , forming vari- 

 ous gradations, where the two meet on the mountain sides. 



26. R. cuNEiFOLius, Pursh. Sand Blackberry. 



Shrubby, 1-3 feet (3-9 decimeters) high, upright, armed with 

 numerous stout, recurved prickles; branchlets and lower side 

 of the leaves whitish woolly, partially disappearing with age; 

 leaflets 3 on the bearing canes, 5 on the young ones, obovate- 

 cuneate, acute or obtuse, thickish, entire at base, serrate toward 

 the apex, often coarsely so on fruiting canes ; inflorescence 

 cymose, peduncles few-flowered ; sepals oblong, mueronate, 

 woolly within and without; petals large, narrowly obovate ; fruit 

 roundish, of excellent quality (Fig. 62). 



