(N/A) The embryo of monocot plants has only one cotyledon. In the grass family, this is called the $Scutellum$, which is located at one side of the embryonal axis.
At its lower end, the embryonal axis has the $Radicle$ and $Root cap$ enclosed in an undifferentiated sheath called the $Coleorrhiza$.
The portion of the embryonal axis above the level of attachment of the $Scutellum$ is the $Epicotyl$. The $Epicotyl$ has a $Shoot apex$ and a few leaf primordia enclosed in a hollow foliar structure, the $Coleoptile$.
Additionally, the $Epiblast$ is a small, non-functional remnant of the second cotyledon found in some grass embryos.