SG Heritage Dictionary

Perfoliate [Adjective] Webster's Dictionary 1828

In botany, a perfoliate or perforated leaf, is one that has the base entirely surrounding the stem transversely.

Perfoliate [Adjective] Webster's Dictionary 1913

1. Having the basal part produced around the stem; -- said of leaves which the stem apparently passes directory through.

2. Surrounded by a circle of hairs, or projections of any kind.