Copyright © Ian Barclay
Copyright © Paul Spracklin
The largest of the Hesperaloes, a genus closely related to Yucca, forms a massive, upright, clustering rosette of heavy, stiff, yellow-green leaves that can reach a diameter and height of nearly 2 m (6 ft.). Native to northeastern Mexico, it is still somewhat uncommon in cultivation. It likes a sunny position in well drained soil and can take serious drought as well as freezing conditions.