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Studies by L. E. Watson et al. (2000) and syntheses by K. Bremer and C. J. Humphries (1993) and by C. Oberprieler et al. (unpubl.) have resulted in changes

the species or subspecific levels varies between 250 and 500 (K. Bremer and C. J. Humphries 1993; H. M. Hall and F. E. Clements 1923; Y. R. Ling 1982, 1995;

Dendranthema); Arctanthemum was also recognized as distinct by K. Bremer and C. J. Humphries (1993), who included Hulteniella in it. Hulteniella is kept separate

production of 7-glycoside flavonols versus 3-glycosides (K. Bremer and C. J. Humphries 1993). C. Oberprieler (2001) showed that Tripleurospermum is closely

irregular teeth. x = 9. n Canada, Alaska, n Eurasia. Species 1. K. Bremer and C. J. Humphries (1993) included Hulteniella in Arctanthemum. Hulteniella has

under the latter). Typification of Matricaria was discussed by K. Bremer and C. J. Humphries (1993), who rejected the arguments of S. Rauschert (1974) in