Figure 2.

Measuring different types of epidermal cell shapes. Convex (or dome‐shaped) cells generally have a rectangular/elongated base cell shape, whereas conical epidermal cells have a circular/hexagonal base cell shape. Left column: shape and measurement of conical epidermal cells; right column: shape and measurement of convex cells. (a,d) top view, (b,e) side view, (c,f): measurements and calculations of different cells shapes. The roughness index was calculated as the ratio of the 3D lateral surface of the cell to the ground plane of the cell’s base (see Methods) db: diameter of cell base, l: cell base length, w: cell base width, h: protruding height, L: long side length.