Rare in North Carolina, Weak-leaf Yucca is similar to the common Adam's-Needle (Yucca filamentosa), but has more pliable, slightly narrower leaves, which may or may not have filamentous margins. It is not clear whether this is a valid species or a variety of Yucca filamentosa.

Grayson Co., VA 5/30/2009.

Alleghany Co., NC 5/27/07.

Synonyms include Yucca filamentosa L. var. smalliana (Fernald) H.E. Ahles and Yucca smalliana Fernald.

Alleghany Co., NC 5/27/07.