Most palms are a straight, unbranched stem, but sometimes a branching stem, or even a creeping vine, such as the rattan. They have large evergreen leaves that are either 'fan-leaved' (palmate) or 'feather-leaved' (pinnate) and arranged in a spiral at the top of the trunk. The leaves have a tubular sheath at the base that usually splits open on one side when it is grown. The flowers grow on an inflorescence, a special branch just for carrying the great number of tiny flowers. The flowers are generally small and white, and are star-shaped. The sepals and petals usually number three each. The fruit is usually a single seed surrounded by flesh. The familiar coconut is the seed of a large fruit. Some kinds may contain two or more seeds in each fruit.