Plenasium javanicum
Plenasium javanicum is a fern in the family Osmundaceae. The genus Plenasium is recognized in the Pteridophyte Phylogeny Group classification of 2016 ; 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, Indochina, the Philippines, Borneo, Sumatra, Sulawesi and Java.