coleoptile

Coleoptile A sheathlike structure that protects the developing plumule in grasses.

芽：用来保护发育的芽的状的结构。

The mature embryo is corn posed of radicle, coleorhiza, plumule, coleoptile, scutellum and epiblast.That is the typical structure of the mature embryo of grass.

成熟有根、芽、盾片、芽、根、外叶等典科植物成熟的结构。