N. B. The inside of the calyx in most of the species, is co- 

 vered with a number of small glands, which make an appeir- 

 ance like a hoar frost. In Prunus insititia there are sometimes 

 2 pistilla. 



PYRUS. 



Calyx. Perianthium l leaf, concave, with 5 shallow clefts, 



permanent; segments expanding. 

 Corolla. Petals 5, circular, concave, large, fixed to the 



calyx. 

 Stamina. Filaments 20, awl-shaped, shorter than the blossom, 



fixed to the calyx. Antheree simple. 

 Pistilla. Germen beneath. Styles 5, thread -shaped, as long 



as the stamina. Stigmata simple. 

 Pericarpium, a Pomum, somewhat globular, with a hollow 



dimple, fleshy, with 5 cells, divisions membranaceous. 

 Seeds several, oblong, blunt, tapering to a point at the base, 



convex on one side, flat on the other. 



ROSA. 



Calyx. Perianthium 1 leaf. Tube bellying, narrow at the neck, 

 lorder globular, with 5 divisions, expanding, segments long 

 spear-shaped, narrow, (2 of which are in some species fur- 

 nished with appendages on each side, and the other 2 alter- 

 nate ones naked, in others only one segment has these ap- 

 pendages.) 



Corolla. Petals 5, inversely heart-shaped, as long as the 

 calyx, and fixed to its neck. 



Stamina. Filaments many, hair-like, very short, fixed to the 

 neck of the calyx. Anthera; hedged. 



Pistilla. Germina numerous, at the bottom of the calyx. 

 Styles as many as there are germina, closely compressed by 

 the neck of the calyx j fixed to the side Of the germea. 



