VARIOUS BLACKBERRIES 385 



plant is apparently common in Illinois and southward in the 

 Mississippi region. The canes usually lack the recurved and 

 willowy habit of R. nigrobaccus, and the absence of the villous 

 pubescence is marked. The leaflets are often canescent below, 

 and usually a little more coarsely toothed than in R. nigrobaccus. 

 In cultivation, the plant has given us Early Harvest, Brunton 

 Early, Earliest of All, and perhaps Bangor; and the plant which 

 is cultivated as the Dorchester belongs to this species, but I do 

 not know if it is the plant which was originally introduced 

 under that name. 



Var. FLORIDUS. R. floridus Tratt. Eos. Monogr. iii. 73 (1823). 

 A form with very short and large-flowered clusters, the floral 

 leaves wedge-obovate and rounded at the top. Trattinnick says 

 that Enslen collected this in North America. What its range may 

 be I do not know. I have seen specimens only from Alabama and 

 Mississippi. It has given no cultivated varieties, so far as I 

 know. (Fig. 91.) 



Var. RANDII. R. villosus var. Randii Bailey, Band & Red- 

 field, PI. Mt. Desert, 94 (1894.) (Fig. 82.) 



Low and diffuse, l-2/ high, the canes bearing very few and 

 weak prickles, or often entirely unarmed, very slender and soft, 

 sometimes appearing as if nearly herbaceous ; leaves very thin, 

 and nearly or quite smooth beneath and on the petioles, the teeth 

 rather coarse and unequal; cluster stout, with one or two simple 

 leaves in its base, not villous, and very slightly, if at all, pu- 

 bescent ; flowers half or less the size of those of R. nigrobaccus ; 

 fruit small, dry and seedy. Woods, Mt. Desert, Maine, New 

 Brunswick, and Keweenaw peninsula, Lake Superior. 



11. RUBUS CANADENSIS Linn, Sp. PI. 494 (1753). R. Millspauglni 

 Britton, Bull. Torr. Bot. Club xviii. 366 (1891). Thorn- 

 less Blackberry. (Figs. 92, 93.) See pp. 322, 367. 

 This plant has the general habit of R. nigrobaccus, 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 the general absence of thorns. It is apparently a 

 well-marked species, growing throughout the country in the 

 higher elevations from North Carolina northward. 



