四面体

The tetrasporophyte wrapped by callose is of simultaneous type.

四呈四面型，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.

花粉母细胞行裂，细胞质裂属同时型，生孢子四，为四面。

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.

孢子母细胞裂胞质裂为同时型,生正四面型四。