| Tripleurospermum maritimum (L.) W.D.J. Koch | |
| Publ. & Syn. | W.D.J. Koch, Syn. Fl. Germ. Helv., ed. 2: 1026 (1845). - Matricaria maritima L., Sp. Pl.: 891 (1753). Lectotype (LINN): Europe. Herb. Linn. 1013.2 (Sell in Jarvis and Turland 1998: 364). |
| Notes | Three taxa are currently accepted within Tripleurospermum maritimum, by western European authors as races (subspecies), by Tzvelev (1987e, 2000a) and Korobkov (PAF proposal, comments) as species. As shown by Hämet-Ahti (1967), they are parapatric and morphologically overlapping. Intermediates are at least partially fertile and are frequent, locally dominating, in the meeting zones in the Nordic area. We follow Hämet-Ahti and accept rank as subspecies. The circumpolar arctic subsp. phaeocephalum is geographically better separated than the two others. This could be an argument for acceptance of a species, probably with priority for the name T. hookeri Sch.Bip. 1853, but still with abundant intermediates towards the two other taxa in northern Europe. |
| Chromosomes | 36 (4x). - Canada. - At least five reports, all for A. sibirica. |
| Geography | Circumboreal-polar. |
| Parent taxon | Tripleurospermum Sch.Bip. |
| Child taxa |
Tripleurospermum maritimum subsp. maritimum Tripleurospermum maritimum subsp. phaeocephalum (Rupr.) Hämet-Ahti Tripleurospermum maritimum subsp. subpolare (Pobed.) Hämet-Ahti |
| PAF ID | 861501 |