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The place on an ovule, or seed, where its outer coats cohere with each other and the nucleus.

Of or pertaining to the chalaza.

Having the ovule inverted at an early period in its development, so that the chalaza is as the apparent apex; -- opposed to orthotropous. Gray.

A false aril; an aril originating from the micropyle instead of from the funicle or chalaza of the ovule. The mace of the nutmeg is an arillode.

Same as Chalaza.

Having or bearing chalazas.

ecundation in which the pollen tube penetrates to the embryosac through the tissue of the chalaza, instead of entering through the micropyle. It was originally discovered by Treub in Casuarina, and has since been found to occur regularly in the families Betulaceæ and Juglandaceæ. Partial chalazogamy is found in Ulmus,…

Having the raphe terminating about half way between the chalaza and the orifice; amphitropous; -- said of an ovule. Gray.

rt of the hilum of a seed, through which the nutrient vessels pass into the rhaphe or the chalaza; -- called also omphalodium.

Having the axis of an ovule or seed straight from the hilum and chalaza to the orifice or the micropyle; atropous.

attached base of the ovule is the hilum, the coatings are united with the nucleus at the chalaza, and their minute orifice is the foramen.

The chalaza of a bird's egg; the treadle.

The chalaza of a bird's egg; the tread.