| Equisetum arvense subsp. alpestre (Wahlenb.) Schönswetter & Elven | |
| Publ. & Syn. | Equisetum boreale auct., non Bong. (1833). - Equisetum arvense var. boreale auct., non (Bong.) Rupr. (1845). - Equisetum arvense subsp. boreale auct., non (Bong.) Á. Löve (1948). |
| Notes | The same subspecific combination by Rønning, Svalbards Fl., ed. 3: 18, 115 (1996), is illegitimate due to lack of any basionym reference. Schönswetter and Elven: Schönswetter et al. (2001) argued that the name subsp. boreale - more or less uniformly used for the arctic-alpine race (e.g., Tolmachev 1960; Øllgaard 2000) - has been misapplied. The name E. boreale Bong., Mém. Acad. Imp. Sci. St.-Pétersbourg, sér. 6, Sci. Math. 2: 174 (1833) [E. arvense var. boreale (Bong.) Rupr., Hist. Stirp. Fl. Petrop.: 91 (1845); E. arvense subsp. boreale (Bong.) Á. Löve, Náttúrufrædingurinn 18: 101 (1948)] is based on a plant from Sitka in southeastern Alaska, in our opinion belonging within subsp. arvense and differing in several characters from the arctic and high alpine plant. The next available name is Wahlenberg's var. alpestre, and we made a subspecific combination based on that name. |
| Chromosomes | >200 216 (2x). - Europe (N), Alaska. - Löve and Löve (1961c); Packer and McPherson (1974, 2n = >200, 'corrected' to 2n = ca. 216 by Löve and Löve 1975a). |
| Geography | Circumpolar-alpine: ICE NOR RUS SIB RFE ALA CAN GRL. |
| Distribution | N = R A = R AN = s B = F AO = s C = F GW = f D = F Ic = f E = R CC = s WI = f YG = s HL = f FN = s EP = s CE = f CS = f UN = f YK = r AW = f GE = f Kh = s SF = f CW = f Tm = s KP = f [ key ] |
| Parent taxon | Equisetum arvense L. |
| PAF ID | 040105b |