Habit: Microgramma heterophylla grows in 2 forms. A sessile, creeping oval form and climbing elliptic/linear sterile and fertile fronds from a short scaly rhizome to 3 mm in diameter. Glabrous subsessile fronds numerous from the rhizome, Each frond linear, up to 12 cm in length and 1 cm wide, with an entire margin and acute apex.
The round sori are arranged in rows parallel to the secondary veins along the abaxial surface. There is no indusium.
Habitat: Microgramma heterophylla grows as an epiphyte/climbing vine in sinkholes, wet shady areas in Dry Broadleaf Evergreen Formation – Forests (coppice).
Distribution: Microgramma heterophylla is known to occur in the central and northern islands of the Lucayan Archipelago as well as the Caribbean, Mexico, Central and South America, Florida.
Medicinal/Cultural/Economic usage: Microgramma heterophylla is not known to be used medicinally in the Lucayan Archipelago.