Characeae

Aquatic multicellular macrophytes include macroalgae (the green algae in the family Characeae), non-vascular plants (e.g., mosses), or vascular plants (the flowering plants).

Aquatic plants 2008

They have been long known in the organs called the antheridia of mosses, Hepaticcae, and Characeae, and have more recently been discovered in peculiar cells on the germinal frond of ferns, and on the very young leaves of the buds of Phanerogamia.

COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1 Alexander von Humboldt 1814