Common Water Clover

Marsilea quadrifolia is a member of the Marsileaceae family and is distributed across several regions including Europe, Asia, and parts of North America. It is found in countries such as Portugal, Vietnam, India, China, and the United States. The species was first published in 1753 by Linnaeus. Discussions regarding the type material for the species have highlighted that certain specimens, such as those cited by Bobrov and Johnson, do not represent original material studied by Linnaeus. The plant is often referred to as four leaf clover or European waterclover, but it is not related to the true clovers of the Fabaceae family.