They have leathery, strap-like leaves which arise from the base of the plant, sometimes from underground rhizomes and flowers which usually occur in clusters (sometimes singly) on stalks which emerge from the bases of the leaves.
They have leathery-like leaves from underground rhizomes and flowers. This is sometimes. This leathery-like leaves usually occur in clusters (sometimes singly) on stalks. This is sometimes from underground rhizomes and flowers. These stalks emerge from the bases of the leaves. These leaves arise from the base of the plant. Leathery is strap.