Glossary

Frond: the leaf of a fern

Pinnae (singular= pinna): the "leaflets" of fern fronds ("leaves")

Pinnule: A secondary pinna ("sub-leaflets")

Rachis: The upper part of the fern petiole, where the pinnae are found

Rhizome: underground stem part of the fern, usually is horizontal

Stipe: The stalk below the blade in ferns