Yucca recuvifolia is one of the hardiest trunk forming Yuccas I know of. Able to handle down to -20F in some of our coldest winters ever. Plants grow with wide dark green leaves spear shaped with a point at the tip. Once plants reach several years old they begin to forms trunks usually 3 to 4 feet tall once they flower they often branch and form two heads. The Yucca flowers emerge form the center of the plant and grow out another 4 feet or more bearing white flowers that smell sweet usually at night. A great plant for a desert theme or if you want a tropical look that can handle a lot of neglect. Plants are currently suckers removed from my larger plants in 4 1/2 inch pots.