Zamia decumbens

Zamia decumbens, common name sinkhole cycad, is a species of cycad known only from Belize. The species was erroneously referred to in print several times as Z. prasina before its recognition as a distinct species. The species was (under the name Z. prasina) proposed for protection as a critically endangered species.

As of 2009, seven populations were known in the Maya Mountains, a few on ridges and mountaintops, but the largest populations at the bottom of sinkholes. Sinkholes are depressions in the earth caused by collapse of the roof of a cave. They very frequently are home to unusual plants and animals because they typically have water at the bottom, and the steep walls also protect the sinkholes from herbivores.