Sabal causiarum is a fan palm with solitary, very stout stems, which grows up to 10 metres (33 ft) tall and 35–70 centimetres (14–28 in) in diameter.

[8] Italian naturalist Odoardo Beccari transferred the species to Sabal and coined the current binomial, S.

[2] In 1903, German botanist Carl Lebrecht Udo Dammer described Inodes glauca, based on collections made near Peñuelas in Puerto Rico by Paul Sintenis.

American botanist Liberty Hyde Bailey described Sabal questeliana in 1944, based on collections from Saint Barthélemy.

Sabal causiarum is found on Hispaniola (in southwestern Haiti and the eastern Dominican Republic), Puerto Rico (including the islands of Mona and Culebra) and in the British Virgin Islands of Anegada,[4] Tortola, and Guana[9] between sea level and 100 metres (328 ft) above sea level.

In 1901 Orator F. Cook described a hat-making industry centred in the village of Joyuda in Cabo Rojo, which made "large quantities" of hats from the leaves of this species.