BREEDING OF VEGETABLES 



255 



Cucumis sativus Cucumber 



Cucumis melo Muskmelon, cantaloupe 



Cucurbita pepo Pumpkin, gourd, summer squash, and 



varieties of winter squash. Peduncle 



hard and ridged. 

 Cucurbita maxima Large field squash and winter squash. 



Peduncle soft and fleshy. 

 Cucurbita moschata Squash. Little grown in United 



States. Peduncle much enlarged where 



attached to fruit. 

 Citrullus vulgaris Watermelon, citron. 



FIG. 61. Structure of flowers of squash. 



1. Female flower a, corolla; b, calyx; c, fruit. 



2. Male flower. 



3. Male flower with calyx and corolla removed. 



4. Female flower with calyx and corolla removed showing a, stigma; 6, style; 

 c, point of attachment of calyx and corolla; d, undeveloped fruit. 



5. 6. Longitudinal and cross sections of fruit. 

 Size: 1, 2, Yn; 3, 4, >n. 



Cummings (1904) experienced no great difficulty in crossing 

 Golden Custard ( 9) with Crookneck (cf), varieties of squashes 

 belonging to C. pepo. The reciprocal cross proved difficult, only 

 five out of 284 pollinations producing fruit with viable seed. A 

 histological examination revealed the fact that the male generative 



