What is "calyptronoma"

Calyptronoma is a genus in the palm family, native to the Greater Antilles. They have pinnately compound leaves with short petioles. The name was coined by August Grisebach who first described the genus in his 1846 Flora of the British West Indian Islands.1

There are three species in the genus—C. occidentalis is endemic to Jamaica, C. plumeriana is found in Cuba and Hispaniola, and C. rivalis is found in Hispaniola and Puerto Rico.