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- Potamogeton illinoensis (category Potamogeton)P. nodosus (= P. × faxonii Morong), P. amplifolius × P. illinoensis (= P. × scoliophyllus Hagström), and P. gramineus × P. illinoensis [= P. × spathuliformis4 KB (448 words) - 20:29, 5 November 2020
- Potamogeton nodosus (category Potamogeton)hybrids, Potamogeton gramineus × P. nodosus (= P. × argutulus Hagström), P. illinoensis × P. nodosus (= P. × faxonii Morong), P. nodosus × P. richardsonii4 KB (454 words) - 20:32, 5 November 2020