Roystonea maisiana is a species of palm which is endemic to the Maisí region of Guantánamo Province in eastern Cuba.
Roystonea maisiana is a large palm which reaches heights of 20m (70feet). Stems are grey-white and are usually 26-, 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 1.5m (04.9feet) long. Individuals have about 15 leaves with 4.8m (15.7feet) rachises; the leaves hang well horizontal. The 0.8- inflorescences bear white male and female flowers. Fruit are 10- long and 7.5mm9.5mm wide, and black when ripe.[1]