Red yucca. An evergreen with tough, narrow, swordshaped, grey-green foliage that emerges from the crown in a rosette pattern. The common name ‘Red Yucca’ is misleading. While it is similar to the true, white yucca, it is not a yucca, but rather a Hesperaloe, Hesperaloe parviflora. Arching long spikes of ...