Beaucarnea Lem.
Engl.: bottle-palm.

Beaucarnea guatemalensis:

Beaucarnea guatemalensis Rose.
Bot. syn.: Nolina guatemalensis (Rose) Cif. & Giacom.

Beaucarnea recurvata

Beaucarnea recurvata Lem.
Engl.: bottle-palm, ponytail palm, elephant-foot-tree.
Suom.: pullojukka.
Sven.: flasklilja, elefantfot.
Bot. syn.: Nolina recurvata (Lem.) Hemsl.

Beaucarnea stricta

Beaucarnea stricta Lim.
Bot. syn.: Nolina stricta (Lem.) Cif. & Giacom.

I have no articles for this botanical term, but there might be some for the next level down (if found).