| Tripleurospermum Sch.Bip. | |
| Publ. & Syn. | Matricaria auct., non L., Sp. Pl.: 890 (1753). |
| Notes | The meaning of the Linnaean genus name Matricaria has been disputed, see, e.g., Hylander (1945) and Rauschert (1974) for previous discussions. Kay (1976) assigned the names "inodora" and "maritima" to Matricaria, the names "recutita" and "suaveolens" to Chamomilla. Recent authors, both Russian (e.g., Tzvelev and Korobkov) and western European (e.g., Kent), assign the former names to Tripleurospermum, the latter ones to Matricaria and Lepidotheca. Jeffrey (1992) proposed to solve the controversy by designating and conserving a neotype for Matricaria recutita. The genus name Matricaria is now conserved in that meaning (McNeill et al. 2006) and thereby inapplicable for the species of Tripleurospermum. However, Applequist (2002) contested the choice of name for the Matricaria species, see below. Many authors have reported the two species T. maritimum and T. inodorum to be, respectively, diploid and tetraploid, and to be distinguished by non-overlapping characters (e.g., shape of the achene glands and the growth form). Brouillet (2006c) stated the chromosomal assumption to be erroneous and reported both species with two levels. Our survey of chromosome number reports still support the ploidy difference and we find two morphologically non-overlapping and quite distinct species with sterile hybrids (Hämet-Ahti 1967). |
| Chromosomes | 36 (4x). - Canada. - At least five reports, all for A. sibirica. |
| Geography | North American (N): ALA CAN. |
| Parent taxon | Asteraceae |
| Child taxa |
Tripleurospermum inodorum (L.) Sch.Bip. Tripleurospermum maritimum (L.) W.D.J. Koch Tripleurospermum tetragonospermum (F. Schmidt) Pobed. |
| PAF ID | 8615 |