Ophioglossum reticulatum

About

Ophioglossum reticulatum, the netted adder's-tongue, is a species of fern in the family Ophioglossaceae. It has a pantropical/pansubtropical distribution; Latin America, the Caribbean, Sub-Saharan Africa, Madagascar, Yemen, South Asia, Southeast Asia, warmer parts of China, Malesia, Korea, Japan, and many tropical islands. It is a hexaploid and has the highest known number of chromosomes of any plant, 720. Its leaves—or leaf, individuals only grow one per year—are edible, and are regularly consumed by people in Africa and Asia.

Summary from Wikipedia