If you are very picky, you will want to remove the chalaza. From Wordnik.com. [Latest Articles] Reference
The chalaza is composed of one or two spiral bands of tissue that suspend the yolk in the center of the white. From Wordnik.com. [Latest Articles] Reference
But here is an odd thing: they never once enter at (what I suppose to be) the "orifice," but generally at the chalaza. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
I have been thinking that the apparent opening at the chalaza end must have been withering or perhaps gnawing by some very minute insects, as the ovarium is open at the upper end. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
In two ovules there was an odd appearance, as if the outer coat of ovule at the chalaza end (if I understand the ovule) had naturally opened or withered where most of the pollen-tubes seemed to penetrate, which made me at first think this was a widely open foramen. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
The entrance of pollen-tubes into the nucellus by the chalaza, instead of through the micropyle, was first fully demonstrated by Treub in his paper "Sur les. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
Entrance of pollen-tubes at chalaza. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
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