48 THE SMALL FRUITS OF NEW YORK 



EE. Leaflets green on both sides ib. R. idaeus vulgatus forma deniidatus 



DD. Leaflets of flowering shoots i-foliolate, rarely temate, roundish, reniform, 



more or less lobed ic. R. idaeus vulgatus forma obtusifolia 



CC. Inflorescence shortly racemose 2. R. idaeus nipponiciis 



BB. Canes bristly to the top 

 C. Canes glabrous 



D. Canes densely beset with usually pale prickles and thin flexible bristles 



3. R. idaeus maritimus 



DD. Canes densely beset with usually purplish black short subulate bristles 



4. R. idaeus melanotrachys 



CC. Canes downy or pubescent R. idaeus canadensis forma eglandulosus 



AA. Inflorescence glandular, bristly and prickly and usually the whole plant more or less 



glandular 



B. Bark of the canes orturions glabrous. (Canes without prickles, see R. idaeus stri- 



gosus forma tonsus) 



C. Prickles rather stout and long with smaller ones between them, densely set; 



flowering branches, petioles, peduncles, and calyxes densely beset with mostly 



dark reddish bristles and glands 5. R. idaeus aculeatissimus 



CC. Prickles bristle form and not much thickened at base 

 D. Leaflets of the new canes oblong to ovate, pointed 

 E. Leaves of flowering shoots mostly pinnately j-foliolate; calyx reddish, very 



prickly and glandular 6. R. idaeus arizonicus 



EE. Leaves of flowering shoots 3-foliolate 



F. Leaflets white tomentose beneath 7. R. idaeus strigosus 



FF. Leaflets green on both sides, tomentose beneath when young 



G. Leaflets not strongly veined 8. R. idaeus peramoenus 



GG. Leaflets strongly veined and plicate 9. R. idaeus viburnif alius 



DD. Leaflets all roundish, on the flowering shoots simple, renifonn-orbicular 



10. R. idaeus egglestonii 

 BB. Bark of the canes downy or tomentose 



C. Turions or young canes green, tomentose and glandular. 11. R. idaeus heterolasius 

 CC. Turions brown or purple 



D. Prickles of the turions all bristle form 



E. Leaflets green on both sides 9. i?. idaeus viburnijolius 



EE. Leaflets white underneath 12. R. idaeus canadensis 



DD. Prickles of the turions of various size and longer, the stouter ones more conical 

 at the base 



E. Leaves of flowering branches 3-foliolate 13. R. idaeus acalyphaceus 



EE. Leaves of flowering branches mostly 5-foliolate. . . .6. R. idaeus arizonicus 



I. Rubus idaeus Linn. var. vulgatus. Arrhenius Rub. Siiec. Monogr. 12. 1839; 

 Focke Spec. Rub. 2:207. 1911. 



R. idaeus. Card Bush-Fr. 314. 1898; Rydberg N. Am. Fl. 22:445. 1913; Bailey 

 Stand. Cyc. Hort. 5:3028. 1916. 



Canes erect, slightly arching at the top, glabrous or finely downy the first year, more 

 or less densely beset with bristles or weak prickles, smooth near the top. Stipules subulate, 

 cilia te; petioles 3-6 cm long, like the petiolules finely downy, prickles small and short, 

 few. Terminal leaflet stalked, ovate or broadly ovate, acuminate, roundish or subcordate 

 at the base, coarsely doubly toothed in the upper half, teeth shortly mucronate; dark 



