Leaves Foliage window

The primary function of the translucent windows is to increase the absorption of radiant energy, and thereby the rate of photosynthesis.[5] Epidermal windows are commonly situated at the apex of leaves, allowing light to be captured and utilized even when the plant is almost entirely below the soil surface,[6] minimizing exposure of leaf surface area to desiccation by intense heat. The windows focus and channel diffused light to the green photosynthesizing surface hidden inside the underground part of the plant.[1] An absence of stomata in the translucent tissue prevents water loss. It has been found in the Lithops species of succulents that leaf window size correlates inversely with habitat solar irradiance; plants growing in regions of high irradiance and low rainfall have smaller windows than those growing in cloudy, high-rainfall regions