Potamogeton pusillus subsp. gemmiparus (J.W. Robbins) R.R. Haynes & Hellquist

Potamogeton pusillus subsp. gemmiparus (J.W. Robbins) R.R. Haynes & Hellquist is a synonym sensu TROPICOS of:

Potamogeton berchtoldii subsp. gemmiparus (J.W. Robbins) Les & Tippery, an accepted subspecies name sensu Les et al., 2009.