Bernard - 2353 - Madagascar
Davidse - 37578 - United States
Davidse - 40175 - United States
Domin - 2133 - Australia
Lemna
Nordstrom - 886 - Finland
Raven - 28463 - United States
Reed - s.n.7830 - United States
Rostovzev - 6971 - Russian Federation
Ulvinen - s.n. - Finland