四面体

The tetrasporophyte wrapped by callose is of simultaneous type.

体呈面体型，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.

花粉母细胞行减数，细胞质同时型，生小孢体，为面体形。

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.

小孢母细胞减数胞质为同时型,生正面体型体。