| Juncus arcticus subsp. intermedius Hyl. | |
| Publ. & Syn. | Hyl., Bot. Not. 106: 353 (1953). Holotype (C): Iceland: Vallenes, 03. July 1893, leg. H. Jónsson. |
| Notes | Elven and Solstad: Juncus arcticus and J. balticus in their strict meanings both occur in Iceland. However, the most common plant there is one combining features from the two (but fertile and probably not a hybrid) and treated by Hylander (1953a, 1953b) as J. arcticus subsp. intermedius. Snogerup et al. (2002) and Snogerup (in comment) refuted extensive occurrence of intermediates between these two species elsewhere. The Icelandic case might either be due to local divergence, and then probably from J. arcticus, or to a break-down in the reproductive barrier between J. arcticus and J. balticus, extensive introgression, and a large-scale homogenization towards an intermediate plant. |
| Chromosomes | (1) 80. - Europe (N), Siberia (N), Canada (E), Greenland. - Several reports. (2) 84. - Canada (Manitoba). - Löve and Löve (1981d). (3) ca. 100. - Europe (Sweden). - Löve and Löve (1944a, omitted by Löve and Löve 1975a). Not included: Reports of 2n = 40 from Putorana in northern Siberia (Krogulevich 1976a), and of 2n = 74 from the Altai in southern Siberia (Sokolovskaya and Strelkova 1948a). Both reports may belong to other races or species. |
| Geography | European (NW): ICE. |
| Distribution | N = F Ic = f E = F [ key ] |
| Parent taxon | Juncus arcticus Willd. |
| PAF ID | 320125b |