四面体

The tetrasporophyte wrapped by callose is of simultaneous type.

呈型，被胼胝质壁所包围。

Pollen mother cells undergo meioses through simultaneous cytokinesis and give rise to tetrads of microspores, which are tetrahedrally arranged.

花粉母胞行减数，胞质属同时型，生小孢子，为形。

Ubisch bodies and lipid bodies are found in the glandular tapetums. In meiosis of microsporocyte, cytokinesisis is a simultaneous type, which produces an isobilateral tetrad.

小孢子母胞减数胞质为同时型,生正型。