A glial cell that ensheaths multiple small diameter axons in the peripheral nervous system. The non-myelinating Schwann cell is embedded among neurons (axons) with minimal extracellular spaces separating them from nerve cell membranes and has a basal lamina. Cells can survive without an axon present. These cells can de-differentiate into immature Schwann cells. [ https://www.worldcat.org/search?q=bn%3A0721662544 ]