This often occurs with typical dubia, and there is little geographic segregation (W), but some authors have considered it distinct (F, Ladd & Thomas 2015). Var. anagallidea tends to have mostly rounded leaf bases (versus cuneate), longer pedicels (mostly 1-2.5 cm versus 0.5-1.5 cm) that exceed leaves (versus about equal); larger flowers on average, with no cleistomagy; and less elongated seeds (L/W = ca. 1.5-2 versus 2-3). In Ky., it appears to occur in less weedy situations, and perhaps in deeper pools. However, Ladd & Thomas (2015) have reported the opposite pattern in habitats: "Var. anagallidea is the common, weedy element in wet muddy or sandy areas statewide... Var. dubia is less common and more likely to occur in better quality habitats, particularly sinkhole wetlands."