 The level of L-DOPA in the beans, however, is much lower than in the pod shells and other parts of the plant.The seeds of "Cassia" and "Bauhinia" trees also contain substantial amounts of L-DOPA.In a species of marine green algae "Ulvaria obscura", a major component of some algal blooms, dopamine is present in very high concentrations, estimated at 4.4% of dry weight.