Matricaria discoidea, Matricaria matricarioides, Matricaria suaveolens,
SE: Gatkamomill, DE: Strahlenlose Kamille ,
NL: Schijfkamille, UK: Pineappleweed, Rayless chamomile

Scientific name:		Matricaria discoidea DC.
Synonym name:		Matricaria matricarioides Porter ex Britton, Matricaria suaveolens (Pursh) Buchenau
Swedish name:		Gatkamomill
German name:		Strahlenlose Kamille
Nederlandse naam:		Schijfkamille
English name:		Pineappleweed, Rayless chamomile
Family:		Compositae / Asteraceae, Sunflower Family, Korgblommiga växter

Life form:		Annual Herb
Stems:		Height 10–30(50) cm, upright, generally branched from base; sweet-scented
Leaves:		Pinnately dissected and sweet-scented when crushed
Flowers:		Short-stemmed flower baskets, about half a centimeter wide, lacking ray florets; more than 50 yellow-green disk flowers
Flowering Period:		July-September
Fruits:		Achene, a cypsela, oblong to oblanceolate, mildly compressed, asymmetrical
Habitat:		Anthropogenic (man-made or disturbed habitats)
Distribution:		Throughout the country

Derivation of the botanical name: Matricaria, Latin matrix, the womb; mater, mother; caries, decay; because of its one-time medical use in affections of the uterus. discoidea without rays, discoid. The standard author abbreviation DC. is used to indicate Augustin Pyramus de Candolle (1778 – 1841),a Swiss botanist. The standard author abbreviation Porter is used to indicate Thomas Conrad Porter ( 1822 - 1901), a botanist, theologian, educator, and poet. The standard author abbreviation Britton is used to indicate Britton, Nathaniel Lord (1859 - 1934), an American botanist and taxonomist who co-founded the New York Botanical Garden in the Bronx, New York. The standard author abbreviation Pursh is used to indicate Frederick Traugott Pursh (1774 –1820), a German–American botanist. The standard author abbreviation Buchenau is used to indicate Franz Georg Philipp Buchenau (1831 – 1906), a German botanist and phytogeographer.