=Parts.=--_Nucleus_, _n_, the essential part in which the embryo is
formed.
_Prīmĭne_, _p_, the exterior coat.
_Secundine_, _s_, the interior coat.
_Mícropyle_, _m_, the opening of the ovary coats.
_Funículus_, the stem to which the ovule is attached.
_Hilum_, _h_, the point of attachment on the ovule.
_Chalāza_, _c_, the place where the coverings and nucleus join
_Rhāphe_, _r_, the connection between the hilum and the chalaza.
N. B.--Through the funiculus, the rhaphe, and the chalaza the ovule
receives its nourishment from the placenta. Through the micropyle it
receives the tubular prolongation of the pollen.
=Kinds.=--_Orthótropous_ [Illustration] straight; no change in direction
of parts (Buckwheat).
_Campylótropous_, [Illustration] curved; the micropyle brought near the
chalaza (Bean).
_Anátropous_, [Illustration] inverted; the micropyle brought near the
hilum, pointing to the placentæ. Rhaphe the whole length of the ovule
(Magnolia).
_Amphítropous_, [Illustration] half inverted; short rhaphe (Mallow).
=Direction of Ovary.=--_Erect_, [Illustration]; _ascending_,
[Illustration]; _horizontal_, [Illustration]; _pendulous_,
[Illustration]; _suspended_, [Illustration].