The Dewberries 211 



the leaflets narrowed at the base and nearly or quite 

 glabrous, the flowers being borne in the upper axils. 



Rubus invisus, Brit., occurs in the same region as the 

 above species, but its canes are less prickly, strong, terete 

 and somewhat ascending, often making mounds of growth; 

 the leaflets are large and the inflorescence dichotomous. 

 R. Bailey anus, Brit., is more slender, not much prickly, 

 with leaflets that are mostly broad at the base and pubes- 

 cent beneath, the leaVes or bracts in the flower-clusters 

 being simple. This is the form described by Torrey and 

 Gray as R. villosus var. humifusus. R. Enslenii, Tratt, 

 occurs from Nantucket and Long Island southward on the 

 Coastal Plain. This is a soft-caned, weak plant, bearing 

 small, loose berries and has probably not entered into the 

 make-up of the cultivated varieties. 



The southern dewberry, R. trivialis, Michx., Fig. 24, is a 

 variable type, chiefly distinguished from the northern 

 forms by having the long, prostrate canes armed with 

 stout prickles, which are sometimes dark purple in color; 

 reddish bristles also occur at times. The leaves are firm, 

 smooth, and practically evergreen, usually bearing stout 

 prickles on the petioles and midribs. The flowers are usu- 

 ally borne on simple, more or less prickly peduncles. The 

 fruit is sometimes excellent but often dry and seedy. This 

 is the common dewberry of the southern states, ranging 

 ^om Virginia to Florida and Texas, often becoming a pest 

 a old fields. 



The California dewberry, R. vitifolius, Cham. & 

 Schlecht., Fig. 25, is the western representative of the wild 

 dewberry family. It is a variable and perplexing species. 

 The canes are long and trailing, or sometimes partially 



