Zamia cardboard palm does have pinnate leaves like a palm tree, but they are rounded with a thick tuberous stem. The evergreen leaflets grow in opposing pairs of up to 12 per stem. It is a low growing plant that may spread 3 to 4 feet (1 m.) and an underground trunk. The trunk stores moisture in times of drought, which makes Zamia ideal for xeriscape gardens. Cardboard palm care requires enough moisture to keep the trunk fat and healthy. Never let it dry to the point that the trunk and stem are wrinkled or dry.