Zamia restrepoi

Zamia restrepoi is a species of cycad belonging to the family Zamiaceae, native to the tropical regions of Panama and Colombia. This species is notable for its subterranean stem, which is ellipsoid and can reach up to 10 centimeters in diameter. It produces two to five large compound leaves, each measuring between 120 and 180 centimeters in length, supported by petioles and rachises that are often covered in small prickles. The leaves are adorned with 20 to 30 lanceolate leaflets, which have distinctively toothed edges and measure 15 to 25 centimeters long and 3 to 5 centimeters wide.

Habitat and Distribution

This cycad thrives in diverse environments, typically found between 100 and 1,000 meters in elevation. Its natural habitats include rainforests, secondary forests, coffee plantations, and the edges of pastures. Historically, it was known from Darien Province in Panama and adjacent areas of Colombia. However, significant habitat destruction, particularly due to the construction of a dam in the 1990s that flooded much of its known range, has severely impacted its populations.

Conservation Concerns

Zamia restrepoi faces critical threats to its survival. As of recent assessments, the sole remaining known subpopulation is alarmingly small, comprising fewer than 100 adult specimens. While extensive surveys have been conducted, the discovery of additional subpopulations has been unsuccessful, highlighting the urgent need for further research into its distribution and abundance. The ongoing deforestation driven by agricultural expansion, including cattle ranching and crop cultivation, along with urban development, places the species' future in jeopardy. Efforts have been made to rescue and replant specimens in reforested areas at higher altitudes, but the overall population remains critically endangered.

Taxonomy and History

The type specimen for Zamia restrepoi was first collected in northern Colombia in 1918 by Francis W. Pennell. It remained undocumented until rediscovered by Rodrigo Bernal in 1986. In 1990, Dennis Stevenson described the genus Chigua, including two species: C. restrepoi and C. bernalii. Later taxonomic work, notably by Anders Lindström in 2009, recognized the close relationship between Chigua and Zamia, leading to the reclassification of C. restrepoi into the genus Zamia, while C. bernalii was identified as a synonym of Z. restrepoi.