Thirty-seven species of Marasmius are reported from Java and Bali. Comprehe
nsive descriptions, illustrations, and comparisons with phenetically simila
r taxa are provided, as is a dichotomous key to aid in their identification
. Twelve taxa are ;described as new: Marasmius araucariae var. siccipes, M.
berambutanus, M. cladophyllus var. tjibodensis, M. cohaerens var. oriental
is, M. coklatus, M. dicandinus, M. halimunensis, M. kembangus, M. luteomarg
inatus, M. perplexus, M. persicinus, and M. schizochaetus.