Family changed from Agavaceae to Asparagaceae.

Plants of the World online, Kew Science http://plantsoftheworldonline.org/taxon/urn:lsid:ipni.org:names:543694-1 Link

The saponins all yuccas contain may lead to abdominal disturbance if eaten raw. They are removed by cooking. Said to be very toxic to dogs.

Professor Anthony Dayan, 2022

The following notes do not apply to Y. flaccida specifically but to the genus as a whole: Although considered poisonous, the Navajo would apply a poultice of the plant to the head to aid sore throats.

Moerman, Daniel E. (2009) Native American Ethnobotany. Timber Press. p.608

Northern America, Eastern Canada

Northern America, North-Central U.S.A.

Northern America, Northeastern U.S.A.

Northern America, South-Central U.S.A.

Northern America, Southeastern U.S.A.