Asia-Temperate, Asia-Tropical: Borneo present; India present; Jawa (Jawa present); Lesser Sunda Is. present; Malaya (Peninsular Malaysia present); Maluku (Maluku present); New Guinea present; Philippines (Philippines present); Sulawesi (Sulawesi present); Sumatera (Sumatera present), New Ireland present, Pacific present: Fiji (Fiji present); Marquesas (Marquesas present), Society Is present, Solomon Islands present, Sri Lanka to Indochina present
India, Sri Lanka to Indochina, China. In Malesia: Sumatra, Peninsular Malaysia, Java, Lesser Sunda Islands, Borneo, Philippines, Sulawesi, Moluccas, New Guinea (including New Ireland). PacificSolomon Islands, Fiji, Society Is., Marquesas
In areas where M. rubidum occurs the marginal vein is often obscure or absent. Microsorum ithycarpum is a form with less prominent venation.