Primordial tissue between the hymenophore and the stipe and tissues differentiating from this primordial tissues: in a closed state (30.jpg) it connects the cap margin with the stem protecting the gills or tubes and once the cap has opened remains as a ring or ring zone around the stem (424A.jpg), (435A.jpg) , (787B.jpg) and/or hanging of the cap margin (716.jpg), (741.jpg).

Alternative form for velum partiale : partial veil.