This DIAGRAM depicts and names the components of a fern frond.

(Derived from an illustration in Fern Finder: A Guide to Native Ferns of Central and Northeastern United States and Eastern Canada by Anne C. Hallowell and Barbara G. Hallowell, published by Nature Study Guild Publishers (keencommunication.com))

Fronds are the equivalent of leaves (generally compound leaves) in an angiosperm, but since they often carry the fertile structures of the plant on the underside, the distinct term frond is used. No other plants use leaves in this way.