Texas yucca or twisted-leaf yucca foliage stays under 2 ft. tall, is edged with white or red. New leaves are straight but become twisted with age. Flowering stalks often over 5 feet tall, bearing a cluster of bell-shaped, white flowers with petals up to 2 1/2 inches long and an inch wide, appearing from April to June. On shallow, stony soil in fields, among scattered trees, and on canyon ledges.A single Texas yucca plant will begin as a solitary leaf head but will become an open clump of several leaf heads.