ROSE FAMILY 



LEAFY-BRACTED BLACKBERRY. LEAFY-CLUSTER 

 BLACKBERRY 



Riibus argutus. Riibus frondosus. 



"A plant of comparatively stiff and straight growth, usually 

 shorter than R. nigrobaccus, with narrower and more rigid leaf- 

 lets. Stems stout, angled, with rather stout straight prickles, 

 and the whole plant glabrous or only slightly villous, except in 

 some of the very young parts. The flower clusters are short 

 and leafy ; flowers about the size of those of R. nigrobacais. Its 

 range is wide, extending from New Brunswick and Lake Superior 

 to Florida, Mississippi and Kansas. It is less common in the 

 north than R. iiigrobaccus but is more abundant in the south, 

 and there is a southern variety." 



— L. H. Bailey. 



THORNLESS BLACKBERRY. MILLSPAUGH'S 

 BLACKBERRY 



Riibus canadensis. Ricbiis 7niUspaiighii. 



"This plant has the general habit of R. nigrobacais, but is dis- 

 tinguished by its long and slender petioles, mostly narrow and 

 long acuminate leaves, long stipules, and especially by its lack 

 of pubescence and general absence of thorns. It is apparently 

 a well-marked species, Q:rowing throughout the country in the 

 higher elevations fron- the Carolinas northward to Lake Supe- 

 rior." 



— L. H, Bailey. 



The following account of this Blackbeny is quoted 

 by Professor Bailey in " The Evolution of our Native 

 Fruits " from notes made by Mr. Kofoid, of North Caro- 

 lina. '* It seems to be very abundant where it occurs, 

 forming- dense thickets of upright stems five to eight 



154 



