How are monoecious and dioecious Alismatales plants different?

In the order Alismatales, the distinction between monoecious and dioecious plants relates to the distribution of unisexual flowers:

• Monoecious: These plants produce both staminate (male) and carpellate (female) flowers on the same individual plant.1
• Dioecious: These plants have different sexes on different individual plants, meaning a single plant will bear either only staminate flowers or only carpellate flowers.1

While many members of the order produce bisexual flowers, those that produce unisexual flowers vary by family and species. For instance, in the family Hydrocharitaceae, species with unisexual flowers may be either monoecious or dioecious. Notably, all marine species within the Hydrocharitaceae are dioecious, relying on water currents to transport pollen chains between separate male and female plants.1