| stemless plant with tufts of grasslike leaves and erect panicle of minute creamy white flowers; southwestern United States and Mexico | perennial plants resembling yucca; found in southern United States and Mexico |
| yucca of west central United States having a clump of basal grasslike leaves and a central stalk with a terminal raceme of small whitish flowers | |
| yucca of southern United States having a clump of basal grasslike leaves and a central stalk with a terminal raceme of small whitish flowers | |
| plant of western North America having woody rhizomes and tufts of stiff grasslike basal leaves and spikes of creamy white flowers | |