NAT. ORDER. 



SenticoscB 



ROSA CANINA. DOG ROSE, OR HEP TREE. 



Class XII. IcosANDRiA. Order V. Polygynia. 



Gen. Char. Calyx, pitcher-shaped, five-cleft, fleshy, contracted at 

 the neck. Petals, five. Seeds, numerous, hispid, affixed to the 

 inner side of the calyx. 



Spe. Char. Fruit, ovate. Peduncles, glabrous. Stalk and Petioles, 

 prickly. 



This small tree usually rises from ten to twelve feet in height, 

 dividing toward the top into many spreading branches, covered 

 with a smooth bark, and beset with alternate hooked prickles ; the 

 leaves are pinnated, consisting of two or three pair of pinnae, or leaf- 

 lets, with an odd one at the end — they are all of an oblong or oval 

 shape, serrated, veined, pointed, growing close to the common foot- 

 stalk, which is prickly, and at its base furnished with a sheathy 

 expansion, fringed at the edges ; the bractece are oval shape, fringed, 

 and placed in pairs at the peduncles, which are smooth; thejloweis 

 are large, terminal, two or three together, and of a reddish or fleshy 

 color ; the calyx is pitcher-shaped at its base, fleshy, separated 

 above into five long expanding divisions, subdividing into smaller 

 segments ; the corolla consists of five inversely heart-shaped petals ; 

 the filaments are numerous, slender, short, inserted in the calyx, and 

 furnished with triangular anthers; the ger?nens are numerous, in the 

 l)ottom of the calyx, supplied with an equal number of styles, which 

 are villous, short, compressed in th» neck of the calyx, inserted in 

 the side of the germen, and terminated with obtuse stigmas ; the 



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