Roystonea maisiana is a large palm which reaches heights of . Stems are grey-white and are usually , sometimes up to , in diameter. The upper portion of the stem is encircled by leaf sheaths, forming a green portion known as the
crownshaft which is normally long. Individuals have about 15 leaves with
rachises; the leaves hang well horizontal. The
inflorescences bear white male and female flowers. Fruit are long and wide, and black when ripe. ==References==