352 



COLLEGE BOTANY 



united; asymmetrical; petals five, usually more or less united, 

 asymmetrical ; stamens ten (sometimes five), monadelphous, 

 diadelphous (or rarely distinct) ; pistil of one carpel and supe- 

 rior ; ovary single. A very large family, containing many of our 

 most valuable agricultural plants (Fig. 194). 



Fro. 191. Strawberry. 



The common garden pea (Pisum sativwm), of which there 

 are many varieties, is well known and may be considered a type 

 of the family. The origin of the pea is not definitely known, but 

 it is extensively cultivated throughout a considerable part of the 

 sub-tropical and temperate zones. The field pea (P. arvense], 

 which is most important as a stock feed, grows wild in Italy. 



