Nucellus: nm A nucellus is reserve tissue, diploid, of maternal origin. It is, in general, transient and disappears during the growth of the embryo. If it persists in the seed, then it is called a perisperm. Ex .: pepper is a seed with perisperm (Piperales, Magnolidae); Caryophyllidae are characterized by the presence of a perisperm ....
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