Caudex

A caudex (pl.: caudices) of a plant is a stem,^[1] but the term is also used to mean a rootstock^[2] and particularly a basal stem structure from which new growth arises.^[3]

In the strict sense of the term, meaning a stem, "caudex" is most often used with plants that have a different stem morphology from the typical angiosperm dicotyledon stem:^[1] examples of this include palms, ferns, and cycads.

The related term caudiciform, literally meaning stem-like, is sometimes used to mean pachycaul, thick-stemmed.^[3]