Clemens - 11442 - United States
Correll - 39099 - United States
Denny - 1152 - Zimbabwe
Denny - 1155 - Zimbabwe
Denny - 1315 - Zimbabwe
Fries - 2756 - Zimbabwe
Gandoger - s.n - Morocco
Gruchy - 24 - United States
Pitard - 686 - Canary Islands
Potamogeton pusillus
Stevens - 1369 - United States
Stevens - 17835 - Nicaragua
Trelease - 960 - Azores
Wild - 5247 - Zimbabwe