Checklist » Asteraceae » Matricaria discoidea
Last updated 10/26/2020 by David Giblin.
Matricaria discoidea DC.[FNA19, HC2]
pineapple weed

Publication: Prodr. 6: 50. 1838.

Origin: Native

selected vouchers: WTU

Notes: FNA19: "Matricaria discoidea has been used as a medicinal and aromatic plant by Native American tribes (D. E. Moerman 1998). It also is considered a weed, and it is resistant to a photosystem II inhibitor herbicide in the United Kingdom ( It is a northwestern North American native that has spread to eastern and northern North America and elsewhere (E. McClintock 1993b; E. G. Voss 1972–1996, vol. 3; A. Cronquist 1994). NatureServe ( and Natural Resources Conservation Service ( erroneously present M. discoidea as introduced on the continent. Its natural habitat is ill-defined because the species has become ruderal even in its native range. For discussion of the nomenclature of this taxon, see S. Rauschert (1974); K. N. Gandhi and R. D. Thomas (1991); Cronquist; and Voss.

Matricaria matricarioides (Lessing) Porter cannot be applied to the American taxon; M. matricarioides was originally published as Artemisia matricarioides Lessing, a new name for Tanacetum pauciflorum Richardson (see S. Rauschert 1974), itself a synonym of T. huronense Nuttall. W. Greuter (pers. comm.), who accepts M. discodea, considers Rauschert\'s treating Artemisia matricarioides as homotypic with T. pauciflorum as equivalent to a lectotype designation."

References: (none)

Synonyms & Misapplied Names:
Chamomilla discoidea (DC.) J. Gay ex A. Braun
Chamomilla suaveolens (Pursh) Rydb.
Matricaria matricarioides (Less.) Porter, illegitimate name[HC]
Santolina suaveolens Pursh