Agave americana subsp. americana
Agave americana subsp. protamericana Gentry
Agave americana var. expansa (Jacobi) Gentry
Agave americana var. oaxacensis Gentry
Belgian Endive, Red Belgian Endive, Curly Endive (a.k.a. Frisee), Escarole, Radicchio (Chioggia) and Radicchio (Chioggia)