| Potamogeton perfoliatus L. | |
| Publ. & Syn. | L., Sp. Pl.: 126 (1753). Lectotype (LAPP): Sweden: "Lapland". Linnaean Lapland Herbarium 69 (Haynes 1985: 178). |
| Notes | Two taxa are proposed as races (most authors) or as species (e.g., Haynes 1985; Haynes and Hellquist 2000c). They differ in comparatively few characters, are distributed as major geographical races, and we treat them as such. |
| Chromosomes | 52 (4x). - Far East (N), Canada, Greenland. - Several reports. |
| Geography | Circumboreal. |
| Parent taxon | Potamogeton L. |
| Child taxa |
Potamogeton perfoliatus subsp. perfoliatus Potamogeton perfoliatus subsp. richardsonii (A. Benn.) Hultén |
| PAF ID | 240105 |