Asplenium macrophyllum is a fern growing up to 50cm tall.
The plant is gathered from the wild for local medicinal use.
Although we have found no reports of toxicity for this species, a number of ferns contain carcinogens so some caution is advisable[
Many ferns also contain thiaminase, an enzyme that robs the body of its vitamin B complex. In small quantities this enzyme will do no harm to people eating an adequate diet that is rich in vitamin B, though large quantities can cause severe health problems. The enzyme is destroyed by heat or thorough drying, so cooking the plant will remove the thiaminase[
Southeast Asia - Philippines.
Dry thickets in the Philippines[
A decoction of the ferns is a powerful diuretic[
]. It is used in the treatment of defective urinary secretion, especially when this is induced by beriberi[
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