| Polygonum neglectum Besser | |
| Publ. & Syn. | Polygonum aequale subsp. oedocarpum Lindm., Svensk Bot. Tidskr. 6: 693 (1912). Described from Sweden. No material cited. |
| Notes | Polygonum neglectum is adventive in the north. It may reach the Arctic in Norway (borderline in two communities), has been found in the Borderline Arctic in northern Alaska (ALA), and is reported as P. arenastrum from several arctic localities in Canada (Scoggan 1978c). The name P. arenastrum Boreau 1857 has often been applied to northern plants. Wolf and McNeill (1987) considered P. arenastrum different from P. neglectum, a view shared (at level of subspecies) by Karlsson (1997, 2000c) who synonymized P. arenastrum with P. aviculare subsp. microspermum. Tzvelev (2000a and in comment) considered subsp. microspermum (as P. calcatum Lindm. 1904) different from P. arenastrum. |
| Chromosomes | (1) 40 (4x). - Europe, Canada, U.S.A. - Löve and Löve (1975c); Krzak (1982); Wolf and McNeill (1987, five counts). (2) 60 (6x). - Europe, Far East (N), Canada. - Krzak (1982); Wolf and McNeill (1987, two counts); Probatova and Sokolovskaya (1989). There are many earlier reports under this name or synonyms but they may belong to other taxa. |
| Geography | European - Asian (W)?: NOR* ALA* CAN*. |
| Distribution | N = * AN = * E = * HL = * FN = * [ key ] |
| Parent taxon | Polygonum L. |
| PAF ID | 410103 |