202 CLASS XII. ORDER I. 



divaricate; leaves opposite, serrate, oval-oblong, sub- 

 falcate ; corymbs terminal. 



Larger than the last. Leaves unequally ovate-oblong. — In 

 rich grounds. — July, &c. — Annual. 



Class XII. ICOSANDRf A. Twenty or more sta- 

 mens, inserted on the calyx. 



Order I. MONOGYNIA. One style. 



214. Cactus. Calyx superior, one leafed, imbri- 

 cate ; petals numerous ; stigma many cleft; berry one 

 celled, many seeded. 



215. Prunus. Calyx inferior, five cleft; corolla 

 fivepetalled; drupe with a smooth or slightly seamed 

 stone. 



Order II. DIGYNIA. Two styles. 



216. Crataegus. Calyx superior, five cleft; petals 

 five; berry two seeded. 



Order III, TRIGYNIA. Three styles. 



217. SoRBUs. Calyx superior, five cleft; petals 

 five ; berry three seeded. 



Order IV. PENTAGYNIA. Five styles. 



218. Pyrus. Calyx superior; five cleft; corolla 

 five petalled ; pome five celled ; cells two seeded. 



219. SpirjEA. Calyx inferior, five cleft; corolla 

 five petalled; capsules two valved, many seeded. 



Order V. POLYG YNTA . 3Iany styles. 



220. Rosa. Calyx urn-shaped, flesh}'-, contracted 

 at the orifice, five cleft; corolla five petalled; seeds 

 numerous, bristly, fixed to the inside of the calyx. 



