294 THE EVOLUTION OF OUR NATIVE FRUITS 



R. strlgosus, the stems bearing nearly straight slender 

 prickles or weak bristles, and usually light -colored ; 

 inflorescence sub -corymbose 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 R. 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 Ritbus 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 are 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 the raspberries, gives me the follow- 

 ing contrasts of the two red-fruited species: 



I{iil>us Idams. Plant usually stiff, erect, and light-colored, the main stems 

 bearing nearly straight 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 

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

 produced more or less continuously throughout the season. 



R. strigosus. Stems more slender than R. Idceus, beset with stiff, straight 

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

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

 type, though largely disappearing in cultivation; calyx slightly pubescent or 

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

 X. Idceus. 



