482 NEW JEKSEY ACailCLLTUJLVL COLLEGE 



to the careful Mork of various experts. For example, Professor 

 A'audiu exjxjrimented many years with different species and found 

 that they rarely hybridized, and then the results were usually sterile; 

 Professor Baile}^ made numerous pollenations between our two com- 

 mon species of Cucurbita, and he states that '"all our experiments 

 show that Cucurhita pepo and C. maxima do not hybridize." A few 

 3'ears later Professor Pammel made extended attemj)ts to produce 

 hybrids, and from his work concludes:* '"(1) that pumpkins (Cu- 

 curhita pepo) and squashes (Cucurhita iiia.vinta) will not hyljridize; 

 (2) that pumpkins and watermelons (Citrullus vulgaris) will not 

 "mix,"' nor will squashes and melons "mix :" (3) cucumbers (Cucvnris 

 sativus), sugar and muskmelons (Cucumis melo) will not hybridize, 

 nor will they "mix" with pumpkins; (4) the different forms of Cu- 

 curhita maxima will readily cross with each other — "'Mammoth Chili," 

 "Hubbard," "Xew Prolific Marrow," "American Turbin," &c. ; (5) 

 The forms of Cucurhita pepo, as the ""Long \Yarted," "Xest Egg 

 Gourd," "Vegetable Marrow," "Xew Golden Bush." ""Bush Scalloped," 

 "Italian Striped," "Perfect Gem," "Common Pumpkin" and '"Sweet 

 Sugar"' will readily cross with each other. 



When we find that two species oi the same genus (Cucurhita) do 

 not hybridize, it is scarcely to be expected that plants in dift'erent 

 genera will "mix." 



EXPERIMENTS "WITH TOMATOES. 



The crossed tomato stock the past summer was confined to the 

 first three plots of Series II., and included about 200 plants. These 

 were descendents of a few sjjecial selections from the first crop of 

 crossed plants in 1900, and represent the fourth and, in a few in- 

 stances, the fifth generation. A majority of the plants represented 

 combinations of a few of the original numl^ers. Such combinations 

 were made in the summer of 1901, when considerable crossing or 

 breeding was done of the choicest representatives of the second 

 generation. 



A type of tomato has been developed from a combination of Xo. 

 144 upon No. 150 (144/150), the original parents of which came 

 from the same red fruit that resulted from a cross of "Golden Sun- 

 rise" upon "Dwarf Champion" in 1899. The yields of these parents 

 for 1900 are given for the season in the tables in the report for 



* Results of Crossing Cucurbits, Bulletin 23. Iowa Experiment Station, 1893. 



