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.