Callitriche heterophylla Pursh var. heterophylla
greater water starwort, two-headed water starwort, variable water starwort
greater water starwort, two-headed water starwort, variable water starwort
June 7,
Drained pond, Tidmarsh Farms, Plymouth
Each carpellate flower consists of an ovary and two thread-like styles. Flowers sessile in axils of leaves. Submersed leaves notched at tips.