^6 THE SMALL FRUITS OF NEW YORK 



E. Inflorescence panicled, richly branched, very prickly .. Series 13: Fruticosi 



EE. Inflorescence usually racemose or the lower peduncles sometimes branched 



F. Inflorescence elongate, without leaf-like bracts or only with a few at the 



base, usually with numerous stalked glands Series g: Alleghenienses 



FF. Inflorescence less elongate corymbose and often with leaf-like bracts higher 

 up, usually not glandular 

 G. Leaflets of the flowering branches acute or acuminate 



H. Leaflets of the canes usually narrow, acute; canes sharply angular 



and deeply furrowed; inflorescence not leafy. . . .Series 10: Arguti 



HH. Leaflets of the canes usually broad and roundish; canes more or less 



terete when old ; inflorescence decidedly leafy. . . Series 1 1 : Frondosi 



GG. Leaflets of the flowering branches short, obtuse or roundish 



Series 1 2 : Floi idi 

 Series i. Caesii. Focke Spec. Rub. 3:252. 1914, as subsection. 



Rubus caesius. Linnaeus Sp. PL 493. 1753; Focke Spec. Rub. 3:253. 1914; 

 Bailey Gent. Herb. 1:153. 1923- 



R. dumetorum Hort. Bailey Stand. Cyc. Hort. 5:3033, fig. 506. 1916. 



Sarmentose shrub, canes erect at first but soon curving down and decumbent or sub- 

 scandent among shrubs or creeping and rooting on open ground, terete, usually glabrous, 

 with a dense white bloom and numerous recurved, small prickles, sometimes undermixed 

 with some rare short-stalked glands. Leaves 3-foliolate; petioles and mainveins prickly, 

 puberulous and sparingly glandular, stipules lanceolate glandular-ciliate. Leaflets very 

 variable in shape, the lower ones sessile or shortly stalked, obliquely ovate and sublobed 

 on the lower, broader part the terminal leaflet stalked, ovate or rhomboid-ovate, subcordate 

 at the base, all obtuse or pointed, sharply, doubly or incisedly serrate, rather thin, bright 

 green, pubescent at least beneath. Flowering branches slender, puberulous, variously 

 glandular and prickly; flowers fascicled, terminal and from axillary peduncles; calyx-lobes 

 ovate, long pointed, more or less glandular, petals broadly elliptical, white. Fruit usually 

 imperfect, composed of a few large, black drupelets with a glaucous hue. 



Europe; from the Mediterranean to Scandinavia, everywhere common, 

 in northwestern Asia as far as the Altai Mountains. Introduced into the 

 United States by landscape gardeners as a ground cover for which it is 

 well adapted. It is a very variable species, according to locality. The 

 fruit is pleasant and not always imperfect, and as it flowers from spring to 

 fall it is perhaps worthy the attention of the hybridizer. Spontaneous 

 hybrids with other species, also with R. idaens, are not uncommon in Europe. 



Series 2. Ursini. Rydberg N. Am. Fl. 22:429, 433. 1913; Focke Spec. Rub. 3:302. 

 1914. 



Vitifolii. 'Qa.W&y Gent. Herb. I'.is^T,. 1923. 



Vigorous shrubs with running, climbing or procumbent, terete canes, propagating from 

 the tips; leaves usually 3-foliolate, or 5-foliolately pinnate, or pedate, often on the same cane. 

 Flowers rarely hermaphrodite, usually by abortion either staminate or pistillate, the 

 staminate flowers mostly showier, and larger. Pedicels and calyx densely and adpressedly 



