Trifolium dubium is a species of annual herb in the family legumes. They have a self-supporting growth form. They are associated with freshwater habitat. They are native to Switzerland, Bulgaria, Lithuania, Italy, Germany, Yugoslavia, Israel, Tunisia, Hungary, Romania, Russia, Latvia, Portugal, Sweden, Cyprus, United Kingdom, Austria, Greece, Ireland, Ukraine, Albania, Norway, Denmark, Belarus, Belgium, Spain, Morocco, The Netherlands, Turkey, Poland, France, and Czech Republic. They have compound, broad leaves. Flowers are visited by Platycheirus clypeatus, Erynnis tages, Melanostoma mellinum, and Nomada flava. Individuals can grow to 0.2 m.
EOL has data for 32 attributes, including: