Development of Stomata in Some Cruciferae

Epidermal structure and ontogeny of stomata are described forten species or varieties of Cruciferae. The mature stomata aretypically anisocytic. Their development is of the mesogenoustrilabrate type. The spiral sequence of divisions in the meristemoidmay be clockwise or anticlockwise. Very often the neighbouringcells divide and form successive generations of stomata whichbecome arranged in groups. Some theoretical implications ofthe study are also discussed.