ROBUS. XLV1I1. ROSACE^E. 249 



scarcely serrate ; stip. deciduous ; fls. umbellate ; fr. globular, nearly black. 

 From China. Thornless shrubs, with small, cup-shaped flowers. Not hardy. 



Obs. This beautiful genus includes, according' to Seringe, 146 species; but the varieties produced by 

 cultivation amount to near 2000. 



11. RUBUS. 



Celtic nib, red ; the color of the fruit of some species. 



Calyx spreading, 5-parted ; petals 5, deciduous ; stamens 00, in- 

 serted into the border of the disk ; ovaries many, with 2 ovules, one of 

 them abortive ; achenia pulpy, drupaceous, aggregated into a compound 

 berry ; radicle superior. *2J. Half shrubby plants. Siems usually QD, ana 

 armed with prickles. Inflorescence imperfectly centrifugal. Fr. esculent. 

 Fruit inseparable from the juicy, deciduous receptacle. BLACKBERRIES. 



1. R. VILLOSUS. Ait. High Blackberry. 



Pubescent, viscid and prickly ; st. angular ; Ifti. 3 5, ovate, acuminate, 

 serrate, hairy both sides ; petioles prickly ; cat. acuminate, shorter than the petals : 

 roc. loose, leafless, about 20-flowered. A well known, thorny shrub, Can. and 

 U. S. Stems tall and slender, branching, recurved at top, 3 6f high. Leaflets 

 2 4' by U 2', terminal one on a long petiolule, the others on short ones or 

 none. Pedicels slender, 1' long. Petals white, obovate or oblong, obtuse. 

 Fruit consisting of about 20 roundish, shining, black, fleshy carpels, closely col- 

 lected into an ovate or oblong head, subacid, well-flavored, ripe in Aug. and Sept. 

 /?. frondvsus. Torr. (R. frondosus. Bin.} Lfts. incisely serrate ; roc. with a 

 few simple leaves or leafy bracts at base ; fls. a'bout 10 in each cluster, the ter- 

 minal one opening first, as in all the species, the lowest next, and the highest 

 but one last. Fruit more acid and with fewer carpels. 



2. R. HISPIDUS. (R. sempervirens. Bw.} Bristly Blackberry. 



St. slender, reclining or prostrate, hispid with retrorse bristles ; Ivs. 3- foliate, 

 rarely quinate, smooth and green both sides ; Ifts. coarsely serrate, obovate,- 

 mostly obtuse, subcoriaceous ; ped. corymbose, many-flowered, with filiform- 

 pedicels and short bracts ; fls. and fr. small. In damp woods, Can. to Car. 

 Stems slender, trailing several feet, with suberect branches 8 12' high. Leaflets 

 I 2' long, i as wide, nearly sessile, persistent through the winter, on a (1 3') 

 long, common petiole. Flowers white. Fruit dusky-purple, sour. May, Jn. 

 d. sctosus. T. & G. (R. setosus. BW.} Lfts. oblanceolate, rather narrow, 

 la 2^' long, tapering, and (like the variety a) entire at base, sharply serrate 

 above. Fruit red. 



3. R. CANADENSIS. (R. trivialis. Ph.} Low Blackberry. Dewberry. 

 St. procumbent or trailing, subaculeate ; Ivs. 3-lbliate, rarely quinate ; Ifts. 



elliptical or rhomboid-oval, acute, thin, unequally cut-serrate; pedicels solitary, 

 elongated, somewhat corymbed ; fr. large, black. Common in dry, stony fields 

 Can. to Va., trailing several yards upon the ground. Leaflets light green and 

 membranaceous, nearly sessile, 1 !' long, as wide, common petioles 1 2 

 long, pubescent or a little prickly. Flowers large, on slender pedicels. Petals 

 obovate, white, twice as long as the calyx. Fruit 1' diam., very sweet an i 

 juicy, in July and Aug. Fl. May. 



4. R. crxRiFOLius. Ph. Wedge-leaved Blackberry. 



S'. erect, shrubby, armed with recurved prickles; Ivs. 3-foliate, and with 

 the young branches and petioles pubescent beneath ; Ifts. cuneate-obovate, en- 

 tire at base, dentate above, subplicate, tomentose beneath ; roc. loose, few-flow- 

 ered. A low shrub, 2 3f high, in sandy woods, Long Island, Torrey, to Flor. 

 Petioles often prickly. Leaflets rarely 5, 1 2' long, as wide, obtuse, or with 

 a short acumination. Petals white or roseate, 3 times as long as the calyx. 

 Fruit black, juicy, well-flavored, ripe in Jl. Aug. Fl. May. Jn. 



Fruit concave beneath, separating from Hie dry, conical, persistent 

 receptacle. RASPBERRIES. 



* Leaves simple. 



5. R. QDORATUS. Rose-flowering Raspberry. Mulberry. 



St. erect or reclining, unarmed, glandular-pilose ; Ivs. palnaately 3 5-lobed, 



