BLACK OR DARK PURPLE 189 



high. It is stiff and armed with stout prickles. 

 It favors sandy soil. 



Of the High-bush Blackberries, Bailey makes 

 three divisions : Rubus nigrobaccus, Rubus ar- 

 gutus, and Rubus Canadensis. Professor Porter 

 also describes another form which Bailey is in- 

 clined to accept as a separate one, Rubus Alle- 

 gheniensis, or Mountain Blackberry. 



COMMON OR HIGH-BUSH BLACKBERRY 

 Rubus nigrobaccus. Rubus villosus Rose Family 



Fruit. These so-called berries are oblong, 

 seedy, firm, and sweet. They grow in long 

 loose clusters, the lower berries usually ripening 

 first. The five long, narrow calyx lobes are 

 reflexed at the base. July, August. 



Leaves. The leaflets are three or five in 

 number. Each has a distinct stem, the terminal 

 one having the longest stalk. The leaflets are 

 ovate, pointed, and coarsely serrate. The under- 

 leaf surface is hairy and glandular. 



Flowers. The large white flowers are borne 

 in long clusters. Each pedicel is long and forms 



