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- pusillus, Potamogeton richardsonii, Potamogeton robbinsii, Potamogeton spirillus, Potamogeton strictifolius, Potamogeton subsibiricus, Potamogeton tennesseensis18 KB (1,124 words) - 20:31, 5 November 2020
- LAYOUT:treatment:TUOYAL familyPotamogetonaceae genusPotamogeton speciesPotamogeton spirillus Tuckerman American Journal of Science, and Arts ser. 2, 6:228. 1848. Robert4 KB (381 words) - 20:29, 5 November 2020
- than one full spiral. It can be separated from the other two, Potamogeton spirillus and P. diversifolius, because it has very narrow submersed leaves without4 KB (388 words) - 20:30, 5 November 2020