308 GENETICS IN RELATION TO AGRICULTURE 
Habit in Sweet Peas.—There are several distinct types of plant in the 
sweet pea the origin of which may be definitely ascribed to mutation. 
The first Cupid plant (ig. 123a) appeared among plants of the tall, 
Fia. 123.—a, Cupid or prostrate, dwarf sweet pea; b, bush or erect, tall form; c, Cupid x 
bush Fi, the ordinary tall form (folded over in order to photograph). (From Bateson.) 
white-flowered ‘variety, Emily Henderson, in 1893. The growers, C. 
C. Morse & Co. of San Francisco, raised seven acres of the new variety 
in 1895 and every plant was true to type. This mutation has since oc- 
Fria. 124.—Dwarf or Cupid sweet peas. J, ordinary or prostrate Cupid; IJ, erect Cupid, the 
F, double recessive from bush X Cupid. (From Bateson.) 
curred in a number of widely separated localities. The bush type also 
originated as a mutation from the tall form. The investigations of 
the factor relations of bush and Cupid sweet peas have been described in 
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