| Rumex longifolius DC. | |
| Publ. & Syn. | Rumex domesticus Hartm., Handb. Skand. Fl.: 148 (1820). Described from Scandinavia. |
| Notes | Rumex longifolius is today mainly a noxious weed in northern Europe, probably an archeophyte, but may be native on seashores northwards into the Arctic. Pollen of subg. Rumex is common in early postglacial sediments in these regions, long before the introduction of agriculture, and this one is the most widespread species. It occurs as a more recent but locally established adventive in other regions, in Greenland most probably from Medieval times in the Norse settlements. |
| Chromosomes | (1) 40 (4x). - Europe (N). - At least three reports. (2) 60 (6x). - Europe, Canada. - Numerous reports. (3) 80 (8x). - Far East (Japan). - Himi et al. (1999). Snogerup (2000) stated that tetraploids are found in five different Finnish populations tentatively referable to this species. |
| Geography | European: ICE* NOR* RUS* SIB* RFE* GRL. |
| Distribution | N = F C = ** GW = r D = ** Ic = f E = S YG = * FN = s CE = * SF = ** Tm = * KP = * [ key ] |
| Parent taxon | Rumex L. |
| PAF ID | 410701 |