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HEBER W. YOUNGKEN 
are connate into a central column of which 2-celled anthers appear as lobes. 
The stigmas are closely set together, forming a small head. The ovary is 
inferior. The 'fruit is a greenish or ivory-white, fleshy, pear-shaped, or 
globose, one-seeded pepo. Its surface is more or less corrugated and marked 
Fig. 4. Plant of the chayote, Chayota edulis Jacq., as grown under field culture in the 
South by the Bureau of Plant Industry, U. S. Department of Agriculture. 
by the presence of spines around both ends. The embryo protrudes from 
the center of the distal end (fig. 5) before the fruit is mature. The seed is 
exalbuminous and consists of a seed coat firmly adherent to the endocarp 
and enclosing two cotyledons, a plumule, and a radicle. The cotyledons 
attain a length of from 2 to 2yi inches, which is on the average one-half the 
ength of the fruit. The average weight of the fruit is about eight ounces. 
