Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Read about Water Shamrock at the Connecticut Botanical Society's website.
Learn more about Marsilea from the Vascular Plants of North Carolina.
Monilophytes (ferns): Leptosporangiate Ferns (true ferns): Salviniales
European Waterclover, European Pepperwort, European Water Shamrock