CT.gov Home caes Current: Marsilea quadrifolia Office of Aquatic Invasive Species Explore CT AIS Data Aquatic Plant Survey Results Management and Prevention Connecticut River Project Herbarium Publications Resources Contact Us Search The Connecticut Agricultural Experiment Station Search the current Agency with a Keyword Filtered Topic Search Marsilea quadrifolia European Waterclover Marsilea quadrifolia *Invasive Herbarium mounts: Batterson Park Pond (1) 08/20/2004 Batterson Park Pond (2) 08/20/2004 Bunnells Pond 06/30/2011 In Cultivation at Magic Pet Shop 09/02/2009 Twin Brook Park Pond 09/01/2004 Zoar Lake (1) 08/28/2007 Zoar Lake (2) 08/28/2007 Zoar Lake 08/23/2012 Zoar Lake 08/09/2016