mesophyll

Updated: May 10, 2025

But my son Francis, after making and examining sections, could nowhere find that the cell-walls had been broken down or that the epidermis had been penetrated. When the section passed through the whitish dots, the grains of chlorophyll were seen to be more or less discoloured, and some of the palisade and mesophyll cells contained nothing but broken down granular matter.

Charles Darwin - The formation of vegetable mould through the action of worms, with observations on their habits