having the stem apparently passing through the leaf, owing to congenital union of the basal edges of the leaf round the stem.
Origin: 1540–50; < NL perfoliātus (see per-, foliate), the fem. of which, perfoliāta, was formerly used as the name of a plant with a stalk that seemed to grow through (pierce) its leafage
(click for larger image in new window) adj. Of or relating to a sessile leaf or bract that completely clasps the stem and is apparently pierced by it.
[New Latin perfoliātus : Latin per-, per- + Latin foliātus, bearing leaves (from folium, leaf; see bhel-3 in Indo-European roots).] per·fo'li·a'tion n.