326 BUSH-FRUITS 



Forms of Rubus setosus often look as if they might be hybrids of 

 R. nigrobaccus and R. strigosus. One of these forms, growing in a 

 dryish tamarack bog at Lansing, Mich., was once thought by Pro- 

 fessor Bailey and others to be such a hybrid. It is as follows : 



Stems upright, 2-3 feet (6-9 decimeters) high, terete, sparingly 

 armed with long, slender, straight or slightly reflexed prickles; 

 peduncles and petioles very slightly pubescent ; leaflets of bearing 

 shoots 3, all sessile, of young shoots mostly 5, the three upper 

 ones petiolate, broadly oval or obovate, acute or obtuse, sharply 

 and irregularly serrate; inflorescence cymose, few-flowered, leafy, 

 sepals small, ovate, acute, slightly tomentose at the margins, and 

 bearing few minute glandular hairs; petals obovate, twice as long 

 as the sepals ; fruit globular oblong, of few grains, adhering to 

 the receptacle. 



23. E. ALLEGHENIENSIS, Porter. R. villosus var. montanus, Por- 



ter. R. montanus, Porter. 



Similar to R. nigrobaccus, plant smaller and more slender, 

 somewhat less prickly, branches commonly reddish, the younger 

 parts very glandular; leaves and inflorescence like nigrobaccus; 

 fruit rather dry, with a somewhat spicy flavor, small, long, thimble - 

 shaped, narrowing toward the tip; drupelets small and numerous. 



Found upon the mountains and higher lands of New York, 

 New Jersey, Pennsylvania and North Carolina. 



24. R. ARGUTUS, Link. R. frondosus, Bigel. R. villosus var. 



frondosus, Torr. 



Plant lower and more bushy than R. nigrobaccus, younger parts 

 pubescent, but sometimes scarcely at all glandular; leaves 

 thicker, rather more numerous and persisting longer in the fall ; 

 leaflets coarsely, sharply and irregularly serrate, both on young 

 and fruiting canes; inflorescence shorter, more corymbose, the 

 lower pedicels subtended by leaves which are mostly simple and 

 smaller toward the tip, giving the cluster a leafy or frondose ap- 

 pearance ; flowers smaller ; sepals broader, less attenuate ; petals 

 roundish. 



Original distribution. Occurs with the type, and northward. 



Represented in cultivation by the Early Harvest and by the 

 Dorchester, which was the first blackberry ever introduced. 



Var. FLORIDUS, Bailey. JR. floridus, Tratt. 



A form with very large flowers in very short clusters, and 

 leaves on the flowering shoots short, broad and nearly or quite 

 obtuse. New Jersey to Alabama. Probably not |in cultivation. 



