Cytogenetics and evolution ofMatricaria and related genera (asteraceae-anthemideae)

The biology of Canadian weeds. 99. Matricaria perforata Mérat (Asteraceae)

“…ln contrast, when the soil in the cylinders was disturbed periodicaliy each year to simulate a cultivation, fiom 3 to 11% of the achenes remained viable after 5-6 yr (Roberts 1964;Roberts and Feast 1972;Roberts and Feast 1973 (Kessler 1989d (Kay 1965;Mitsuoka and Ehrendorfer 1972). Attempts to artificially cross M. perforata with Chamomilla species were not successful, suggesting that these two genera are not as closely related as Anthemis and llatricaria (Kay 1965;Mitsuoka and Ehrendorfer 1972;Heywood and Humphries 1977 (2x) yielded sterile triploid progeny (Woo 1989 (Woo 1989 (Woo, unpublished data (Stahlman andHoag 1974, Kessler 1989c (Lobay and Carder 1965) since bromegrass is a strong competitor.…”

The taxonomic position of Matricaria macrotis (Compositae-Anthemideae)

“…All these characters support the molecular phylogenetic findings, so it is mainly the lack of pales that argues against the inclusion of Matricaria macrotis into Anthemis. However, since Greuter (1968) found that in species of the former Ammanthus presence or absence of pales "does not even necessarily suffice to distinguish species" (which led him to transfer these species to Anthemis), since Mitsuoka & Ehrendorfer (1972) demonstrated that the inheritance of pales is probably under simple oligogenic control and since Napp-Zinn & Eble (1978) observed sporadic paleate capitula in the usually epaleate species of Glebionis (sub Chrysanthemum), the restriction in the taxonomic value of this character has become evident. Anthemis species may even show variation in the presence or absence of pales, e.g.…”

On the taxonomic position of <em>Tanacetum funkii</em> (Anthemideae, Compositae)

“…& Heldr., nowadays included in Anthemis; Lo Presti & al., 2010). However, crossing experiments carried out by Mitsuoka & Ehrendorfer (1972) have shown that the presence/absence of receptacular scales is under oligogenic control in the tribe and, therefore, may be of minor taxonomic significance. Nevertheless, the presence of receptacular scales in T. funkii together with its solitary, small, and shortly pedunculated capitula ( fig.…”