Plenasium javanicum

Plenasium javanicum is a fern in the family Osmundaceae. The genus "Plenasium" is recognized in the Pteridophyte Phylogeny Group classification of 2016 (PPG I); however, some sources place all "Plenasium" species in a more broadly defined "Osmunda", treating this species as Osmunda javanica. It has a wide native distribution in south-eastern Asia, being found in the Eastern Himalaya, south-central and south east China (including Hainan), Indochina, the Philippines, Borneo, Sumatra, Sulawesi and Java.