Testa

Hmmm, that's sort of interesting question. Walnuts (which are stones in fact) also have carved testa.

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... when they reached appropriate size they were examined for visible parts. On the exterior the radicle, hilum, and micropyle were visible. When the testa was removed, and the cotyledons separated, the seed revealed the hypocotyl and two folded plumule leaves which were easily separated with a probe. ...

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