380 



COLLEGE BOTANY 



bell-shaped calyx ; fivei-parted gamopetalous wheel or bell-shaped 

 corolla; stamens five (or by union apparently three) ; ovary in- 

 ferior, one- to many-chambered; fruit a many-seeded berry. 

 Mostly tropical and sub'-tropdcal and containing many economic 

 plants (Fig. 221). 



The common cucumber (CiMCumis sativus) is widely dis- 

 tributed throughout the world and is considered one of our most 



Fig. 222. — Ribbed type of cantaloupe. 







important garden crops. The many varieties of muskmelon and 

 cantaloupe (C. melo) are Asiatic plants which were grown by the 

 ancients and are now widely distributed throughout a con- 

 siderable part of the world (Fig. 222). 



The common watermelon (Citrvllus vulgaris) is an African 

 plant which was cultivated by the ancient Egyptians. Although 

 it originated in the tropics, its cultivation is practiced far into 

 the temperate zones. 



The squashes (Cucurbita melopepo, C. verucosa, C. maxima, 



