ICOSANDRIA DI-PENTAOYNIA. 371 



HAB. Wet places. July Aug. % ; stem 12 18 in. high leaves 

 alt. pet. mostly 



DECAGYNIA. 



223. PHYTOLACCA. Poke. 



P. decandra : leaves ovate, acute at each end ; flowers with 10 stamens 



and 10 styles. 

 HAB. Waste places. June Oct. %. ; smooth, 48 feet high, purp. 



fl. racem. wh. ber. purp. 



ICOSANDRIA. 

 MONOGYNIA. 



Genera. 



224. CACTUS. Calyx superior, many-cleft; segments imbricate; 

 pet. numerous, inserted in several series ; the interior ones larger ; 

 stig. many-cleft ; berry 1-celled, many-seeded. 



225. PRUNUS. Calyx inferior, campanulate, 5-cleft, deciduous ; pet. 

 5 ; drupe even ; nut with a prominent suture. 



226. LYTHRUM. Calyx tubular-campanulate, 612 toothed ; pet. 6, 

 equal, inserted upon the calyx ; caps. 2 4-celled, many-seeded 



DI-PENTAGYNIA. 



227. AGRIMONIA. Calyx inferior, 5-cleft, with a lobed calicle a 

 its base ; petals 5 ; stamens 12 ; achen. 2, in the bottom of the 

 calyx. 



228. CRAT^EGUS. Calyx superior, 5-cleft ; pet. 5 ; styles 15 ; fruti 

 pulpy, closed, with from 2 5 1 -seeded nuts. 



229. SORBUS. Calyx 5-cleft ; pet. 5 ; styles 2 or 3 ; berry inferior, far- 

 inaceous, with 3 cartilaginous seeds. 



230. ARONIA. Calyx 5-toothed ; pet. 5 ; berry inferior, 5 10-celled ; 

 cells 1 2-seeded ; seeds cartilaginous. 



231. SPIRAEA. Calyx inferior, 5-cleft, expanding; pet 5, eqaal, round- 

 ish ; stam. numerous, exserted ; caps, numerous, (3 12,) 1-celled. 

 2-valved, each 1 3-seeded. 



