Yucca whipplei

Yucca whipplei

Yucca whipplei Torr.
Engl.: chaparral yucca.
Bot. syn.: Hesperoyucca whipplei (Torr.) Baker, Yucca californica Lemmon, Yucca newberryi McKelvey, Yucca nitida C. Wright ex W. Wats.

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