Lecanopteris mirabilis is a species of tropical fern in the genus Lecanopteris native to Papua New Guinea and Sulawesi.

[1] An epiphyte, its name means "wonderful" or "marvelous".

[2] Like others of its genus, it grows from a large rhizome that in this case can be up to 25 centimetres (9.8 in) in diameter.

[3] This rhizome forms a shelter for ants, making this a myrmecophyte, though unlike others of its genus the rhizome is flattened and doesn't contain hollow galleries.

[4] Individual fronds may be up to 85 centimetres (33 in) long.