294 THE EVOLUTION OF OUR NATIVE FRUITS 



R. strigosus, the steins bearing nearly straight slender 

 prickles or weak bristles, and usually light -colored ; 

 inflorescence sub-coiymbose — the pedicels short, and 

 aggregated above, where they are erect or ascending ; 

 fruit large and broad, appearing more or less contin- 

 uously throughout the summer, purple or yellowish, 

 firmer than that of B. strigosus ; calyx glandless. The 

 raspberries belonging to this species are usually ten- 

 der in the North, as we have seen, and they have not 

 been grown to any extent since the introduction to 

 cultivation of the native species. Here belong the 

 Fontenay, Antwerps, Fastolf, Brinckle's Orange, and 

 their kin.* 



These descriptions and figures show that the purple- 

 cane or Rubus neglectus class is intermediate between 

 the black-cap and true red raspberries. The type has 

 no characters which are not found in one or both of 

 the other two. Neither has it any normal or contin- 

 uous range, but occurs where the black and red spe- 

 cies arc associated. All this points strongly to hybrid- 

 ity; and there is now sufficient accumulation of exper- 

 imental evidence to prove a hybrid origin for these 

 berries. 



*Card, who has given much thought to t ho raspberries, gives me the follow- 

 ing contrasts of the two red-fruited species: 



Rubua hiintx. — Plant usually Btiff, erect, and light-colored, the main Btema 

 bearing nearly Btraighl slender prickles; flowering shoots, petioles, veins, pedi- 

 cels and calyx finely pubescent, but not glandular, and sparsely beset with firm 

 recurved prickles; leaves thicker than in R. strigosus, whitened downy beneath 

 ami usually somewhat wrinkled; calyx tomentose; fruit dark red or yellow, 

 produced more or less continuously throughout the Beason, 



/,'. etrigi ixus. — Si. -ins more slender than 11, Tdceus, beset with stiff, straight 

 prickles, usually brown or reddish brown, somewhat glaucous; flowering Bhoots, 

 pedicels, calyx ami petioles hirsute with glandular-tipped hairs in the wild 

 ough largely disappearing in cultivation; calyx slightly pubescent or 

 hirsute; fruit light red, rarel] yellow, produced less continuously than in 

 R. IdoBUS. 



