The annulus is vertical, well-developed, and interrupted by the stalk. They are borne in groups of 32 or 64. They bear both scales and numerous, fibrous roots. They often eventually break off well above the ground. They may be clustered or widely spaced, and range from 5 cm to 2 m long.
Leaves are usually glabrous, sometimes glaucous, and are slightly scaly, pubescent, or farinose.