Parmotrema submarginale is a species of corticolous (bark-dwelling), foliose lichen in the family Parmeliaceae.

It was first formally described as a new species in 1803 by French botanist André Michaux, who called it Lobaria submarginalis.

Paula DePriest and Beatrice Hale transferred it to the genus Parmotrema in 1998.

[2] It is found in Bolivia, Brazil, Costa Rica, Thailand, and the United States.

[3] Paragyalideopsis floridae is a lichenicolous fungus that has been documented infecting Parmotrema submarginale in Florida.