,_^._. BOSACEAE 81 



Obs. This species is very common in New Jersey ; but is rather 

 scarce on our side of the Delaware. 



t f Stem procumbent, armed with short or slender prickles. 



"? R. Canad6nsl 9 L. Stems fruticose, smoothish, extensively 

 trailing; leaflets ovate, acute, thin; fruit large, sweet. 

 R. trivialis. Pursh. $ Fl. Cestr. ed. 2. p. SOS.^not of MX. ' J 1 '', 

 CANADIAN RUBUS. Dewberry. Running Brier. 



Stem 3 or 4 to 8 or 10 feet long, slender, often several from the same root 

 running in different directions, and giving out numerous leafy pubescent flower- 

 ing branches, which are nearly erect, and 2 to 4 or 6 inches in length. Leaflets 

 mostly ternate, an inch to an inch and half long. Flowers somewhat corymbose 

 on the short branches. Fruit oblong or roundish, half an inch to near an inch in 

 diameter, black when mature, very succulent and sweet. 

 Hab. Rocky sterile soils; old fields, c.: frequent. Fl. May. Fr. July. 



Obs. Our Dewberry is a fine fruit, and is generally preferred be- 

 fore all the other Blackberries proper ; but it is not the " Dewberry'* 

 of England, which is R. caesius, L. 



S. R. liispidlis, L. Stems suffruticose, bristly, slender; leaflets 

 cuneate-obovate, obtuse, subcoriaceous ; fruit small, acerb. 

 R. obovatus, Pers. Fl. Cestr. ed. 2. p. 308. 

 HISPID RUBUS. Swamp Blackberry. 



Stem 2 to 4 feet long, armed with retrorse bristles, which often become slender 

 prickles. Leaflets about an inch long, often living through the winter. Flowers 

 subpaniculate. Fruit black when mature. 

 Hab. Swampy thickets, among moss, &c.: frequent. FL June. Fr. Aug. 



Obs. This species is pretty much confined to shaded sphagnous 

 swamps. 



TRIBE 3. RO V SEAE. 



I'istiU numerous, inserted on the hollow receptacle which lines the fleshy oalyx- \ 

 tube; calyx-segments imbricated, often foliaceous at apex. 



122. RO'SA, Tournef. 



[Latinized from the Celtic, Rhos, red ; the prevailing color of the flowers.] 

 Calyx-tube urceolate, finally berry-like. Petals 5. Stamens numer- 

 ous, inserted with the petals on the rim of the calyx-tube. Styles: 

 nearly included ; ovaries distinct, hirsute, becoming bony akenes. 

 Shrubby and prickly: leaves odd-pinnate; stipules adnate to the pe- 

 tiole. 



1. R. Carolina, L. Stem-prickles stout, recurved; flowers ia 



terminal corymbs. 



CAROLINA ROSA. Swamp Rose. 



Stem 4 to 6 feet high, with numerous purple branches. Leaflets mostly 5 or 7,. 

 1 to 2 inches in length, generally elliptic-lanceolate. Flowers red or purplish. 

 Fruit (i. e. the fleshy or berry-like calyx-tube, called a Hip,) depressed-globose, 

 somewhat glandular-hispid, dark red and shining when mature. 

 Hab. Low moist grounds, thickets, Ac.: frequent. FL June. Fr. Sept. 



Obs. This is often a troublesome plant, in wet meadows, and low 

 grounds. 



6 



