Isoetid

Isoetids are aquatic plants or wetland plants named for their superficial similarity to the quillworts, Isoetes.

They occur in wetlands and on shorelines with low nutrient availability.

[1] Owing to their slow growth rates, they are also often found in areas with low rates of sediment deposition.

[3] Often they are exposed during periods of low water.

Common examples include Lobelia dortmanna and Eriocaulon aquaticum.