Tags: Fern.
Elaphoglossum serpens is a rare species of fern that grows only on Cerro de Punta the highest mountain in Puerto Rico. The fern grows at one location where there are 22 known specimens. It was federally listed as an endangered species of the United States in 1993.The fern was described in 1947 from specimens found at Monte Jayuya. This habitat was cleared for construction and the plant was extirpated. It was later located on Cerro de Punta.