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Updated: February 25, 2025
In cryptosperma they are so strongly developed as to completely hide the kernels. Obviously they constitute a case of reversion to the characters of some unknown ancestor, since the corn is the only member of the grass-family with naked kernels. The var. tunicata, for this same reason, has been considered to be the original wild form, from which the other varieties of corn have originated.
A very curious instance of reduced bracts, developing to unusual size, is afforded by a variety of corn, which is called Zea Mays cryptosperma, or Zea Mays tunicata. In ordinary corn the kernels are surrounded by small and thin, inconspicuous and membranaceous scales. Invisible on the integrate spikes, when ripe, they are easily detected by pulling the kernels out.
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