Lyonia truncata is a species of flowering plant in the family Ericaceae known as Dominican staggerbush. It is a shrub or tree native to Hispaniola (the Dominican Republic and Haiti) and Puerto Rico.
Three varieties are accepted: Lyonia truncata var. montecristina – Hispaniola Lyonia truncata var. proctorii – Puerto Rico Lyonia truncata var. truncata – Hispaniola
Lyonia truncata var. proctorii, or Proctor's staggerbush, is a rare plant endemic to Puerto Rico. It is federally listed as an endangered species by the United States government.USFWS. L. t. var. proctorii Species Profile
References
External links USDA Plants Profile