Fig. 6.1-6. Longitudinal section of a shoot tip of a fern (Nephrolepis). The long, narrow structures along the right side of the micrograph are hairs (also called trichomes). Each is just a single row of cells, and near the top of the micrograph is a single cell bulging out of the stem surface. The bulging cell will develop into a hair by undergoing several cell divisions. Because it undergoes just a few divisions to make the hair, it is usually considered a meristemoid rather than a meristem.