THE SMALL FRUITS OF NEW YORK 85 



Rubus ulmifolius var. inermis. Focke Spec. Rub. 3:378. 1914; Bailey Gent. Herb. 

 i:i07- 1925- 



R. inermis. Willdenow Enttm. PL Hort. Berol. 1:548. 1809. 



A robust thornless blackberry ; canes obtusely angled, more or less densely downy from 

 grayish stellate hairs. Petioles shorter than the lower leaflets, unanned and downy like 

 the canes, stipules subulate; leaflets 3-5, rather firm in texture, green and mostly glabrous 

 above, beneath with adpressed fine whitish felt, finely simply or doubly serrate, usually more 

 irregularly so near the top of the temiinal leaflets or on the outer margin of the lower ones, 

 which are obliquely ovate and sometimes obscurely lobed, acute or roundish at the base 

 and with a short sharp point; terminal leaflet longer, obovate-oblong, pointed from the upper 

 third, rounded at the base. Inflorescence panicled. Berries black, edible. 



This is a sport of a widely-spread and very variable European bramble, 

 known in European gardens more than lOO years. It was introduced into 

 the United States and put in trade by Luther Burbank under the varietal 

 names Santa Rosa, Sebastopol, and Cory Thornless, which are identical 

 with Willdenow's herbarium type specimens. 



