The type specimen was collected by the first author from a residential property in Brevard County, Florida, where it was found growing on the leaves of Citrus.

[3] The thallus of Gyalectidium floridense can be found on the surface of leaves, either on top (epiphyllous or underneath (hypophyllous, and is crustose in nature.

[2] Hyphophores (highly derived conidiomata that are unique to the family Gomphillaceae), which are frequently found near the thallus margin along the edges of the areoles, are also present.

Spaces, which may be occupied by crystalline deposits, are frequently visible between the epilayer and the remaining lower part of the thallus.

[4] Gyalectidium floridense bears some resemblance to specific forms of G. catenulatum, which occurs in northern areas of Argentina.

This particular species also features enrolled hyphophores, with similar horn-like shapes found in the populations from northern Argentina.