Mint Charlie (Micromeria brownei) is aquatic and then isn't aquatic. It is native to South Florida, amongst other places, but it is a Native plant in my area. I see it growing in either shady damp conditions as a terrestrial plant, and I have also seen it submerged for extended periods of time and growing extremely well. It is similar to another Florida native, Hydrocotyle verticillata. Another plant that grows as a weed in my back yard, yet grows extremely well submerged. Most plants seen in the trade are actually bog plants or plants that can readily adapt to both terrestrial and submerged conditions.
Anubias
crypts
Marsilea
Echinodorus
Hygrophila
Marsilea
Hemianthus
Mosses
Bolbitis
Lysimachia
All of the above have species that can readily adapt to grow in both conditions. THere are many many more. It is a matter of how long will they do well submerged. The plants we advocate for use in the trade are plants that are proven to do well for extended periods of time submerged, rather than the typical "non-aquatics" that only survive for a small amount.
Mint Charlie is in the grey area in this regard.