56 



abundant on the sandy plains of southern New Jersey ; R. alle- 

 ghaniensis VortQt {R. nigrobaccus'QdS\ey), the common blackberry 

 of New England, is rare ; but there are three which are common. 

 .Perhap^XJie most abundant of all is the common dewberry R. pro- 

 cuvibcns Muhl. The southern high blackberry, R. Andrezvsianiis 

 Blanchard, which is common from southern Connecticut and 

 northern New Jersey to North Carolina, is abundant and a pro- 

 lific bearer. The third in abundance is an undescribed species of 

 the fro lidos us class which seems to have been unnoticed by botan- 

 ists. Though it often makes a very large plant, it is seldom as 

 tall as R. Andrewsiamis and in general appearance is a sort of 

 " half high " or intermediate between R. proaanbcus and R. An- 

 dreivsiamis. It may be named and described as 



Rubus philadelphicus sp. nov. 



Large, round-stemmed, erect-recurving plants, pubescent and 

 glandless, lightly armed, fruit-branches leafy, bearing a fine crop 

 of large, early, much esteemed fruit. 



Ncxv canes. — Stems stout, hard, erect at first, then recurved, 

 2 to 4 feet high, 4 to 8 feet long, greenish, glabrous and gland- 

 less, terete or nearly so, much branched, the branches recurved 

 and the end touching the ground, or prostrate, few noticed tip- 

 ping. Prickles few, 4 or 5 to the inch of stem, o. 125 to 0.184 

 inches long, slender, strong, set at a right angle to the stem and 

 in lines over the pentagonal pith. Leaves 5-foliolate, large ones 

 9 inches long by inches wide, rather thick, }'ellow-green, with 

 many appressed hairs, but nearly smooth on the upper surface, 

 slightly whiter, with much pubescence, and velvety below. Leaf- 

 lets broad, often only the middle ones noticeably stalked, taper- 

 pointed, singly or slightly doubly serrate-dentate, otherwise en- 

 tire ; middle leaflet broadly ovate, rounded at the base or slightly 

 cordate, the side leaflets broadly oval or rhomboidal,wide-cune- 

 ate, and the basal ones similar in shape but smaller. Petiole and 

 petiolules stout, grooved, villose-pubescent, glandless ; prickles 

 rather numerous, stout and hooked; the petiole of the middle 

 leaflet less than i inch long, the side leaflets short-stalked and 

 the basal ones sessile. 



Old canes. — Stems hard, prickles intact. Second year's growth 

 consisting entirely of leafy fruit-branches, from 6 to 12 inches 

 long, tipped with inflorescence, the branches graded regularly in 

 length, one from the axil of each old leaf. Axis of branch some- 



