Tripleurospermum perforatum, Tripleurospermum inodorum, Matricaria inodora,
SE: Baldersbrå, DE: Geruchlose Kamille, NL: Reukeloze kamille,
UK: scentless false mayweed, Scentless Mayweed, German chamomile

Scientific name:		Tripleurospermum perforatum (Mérat) Laínz
Synonym name:		Tripleurospermum inodorum (L.) Sch.Bip., Matricaria inodora L., Matricaria maritima L. ssp. inodora (K.Koch) Soó, Matricaria perforata Mérat
Swedish name:		Baldersbrå, Ogräsbaldersbrå, Surkulla
German name:		Geruchlose Kamille
Nederlandse naam:		Reukeloze kamille
English name:		scentless false mayweed, Scentless Mayweed, German chamomile
Family:		Asteraceae / Compositae, Korgblommiga växter

Life form:		Annual
Stems:		Yellowish-green, erect, highly branched, ascending stems, sometimes flushed reddish-purple
Leaves:		Rosette leaves oblong-spathulate, irregularly tripinnate, thread-like, branched segments 0.6-1.mm wide
Flowers:		Floral heads, white ray flowers and equally yellow tubular disc flowers
Flowering Period:		June, July, August, September, October
Fruits:		Achenes 2.5-3.5 mm, triangular with three clear bright ribbons.
Habitat:		Throughout the country, roadsides, fields and gardens

Derivation of the botanical name: Tripleurospermum, Greek treis, "three," pleura or pleuron, "rib," and sperma, "seed," referring to the achenes perforatum, with the paired leaves joined at the base and thus 'perforated' by the stem. inodorum, in, "in, into, for, contrary;" odorus, "sweet smelling, fragrant;" unscented. Matricaria, Latin matrix, "womb," mater, "mother," caries, "decay," because of its one-time medical use in affections of the uterus. The standard author abbreviation Mérat is used to indicate François Victor Mérat de Vaumartoise (1780 – 1851), a French botanist. The standard author abbreviation Laínz is used to indicate José María Laínz Ribalaygua (1900 - 1977), a Spanish botanist. The standard author abbreviation L. is used to indicate Carl Linnaeus (1707 – 1778), a Swedish botanist, physician, and zoologist, the father of modern taxonomy. The standard author abbreviation Sch.Bip. is used to indicate Carl Heinrich 'Bipontinus' Schultz (1805 – 1867), a German botanist. The standard author abbreviation K.Koch is used to indicate Karl Heinrich Emil Koch (1809 – 1879), a German botanist. The standard author abbreviation Soó is used to indicate Soó Rezső (1903 – 1980), a Hungarian botanist. Mayweed is very similar Tripleurospermum maritimum, but the latter is a perennial, stems often have a reddish brown tone, fleshy leaves and often more nedliggande, reddish stem that is sometimes almost ligneous hem.