| Rumex occidentalis S. Watson | |
| Publ. & Syn. | S. Watson, Proc. Amer. Acad. Arts 12: 253 (1877). Described "from Alaska to Northern California, east to Saskatchewan and Labrador, and southwards in the mountains to Colorado and New Mexico". - Rumex aquaticus subsp. occidentalis (S. Watson) Hultén, Circumpolar Pl. 2: 132 (1971). |
| Notes | Mosyakin (2005) discussed the variation in Rumex occidentalis and suggested that the western North American plant cound merit recognition as a regional race: subsp. fenestratus (Greene) Hultén, Circumpolar Pl. 2: 132 (1971) [R. fenestratus Greene, Pittonia 4: 306 (1901); described from near Comox on Vancouver Island, British Columbia, Canada]. This taxon does not reach the Arctic. |
| Chromosomes | (1) 120 (12x). - Canada (E). - Löve (1986, but see below). (2) 140 (14x). - Canada. - Mulligan (1957); Taylor and Mulligan (1968). (3) 160 (16x). - Canada. - Degraeve (1975); Löve and Löve (1982a). (4) 200 (20x). - Canada. - Löve and Ritchie (1966, 'corrected' to 140 by Löve and Löve 1975a). Löve and Löve (1975a) reported this species to be only 14-ploid. The several numbers - mainly counted or reported by the Löves themselves - indicate that this may be an unwarranted simplification. |
| Geography | Amphi-Pacific - North American: CAN. |
| Distribution | N = F E = R CC = r HL = r [ key ] |
| Parent taxon | Rumex L. |
| PAF ID | 410704 |