In the secreting salt glands of Tamarix aphylla, the covering cuticle is detached from the apical walls of the upper cells forming a salt-accumulating subcuticular chamber. The raised cuticle is transversed by pores through which the salt is excreted to the outside. Cuticular pores are observed to be filled with pectocellulosic material which presumably regulates releasing of the salt, so that this is gentle and not squirted due to the development of hydrostatic pressure within the subcuticular space. At the inner mouth of each cuticular pore, a globular structure of cutin exists which may operate as a valve plugging and opening the pore. At early secretion, the cuticle is covered by an impermeable highly lipophilic layer of wax which blocks the exit of the aqueous salty solution and favours the development of hydrostatic pressure. Later, at intense secretion, the waxy layer declines allowing thus the salt to be freely excreted to the outside through the pores. Cutin globules probably have an analogous function with the waxy layer.