3-468: Tripleurospermum is a genus in the chamomile tribe within the sunflower family . Mayweed is a common name for plants in this genus. Most of the species are from Europe and temperate Asia although a few are from North America and North Africa. The species are placed in Matricaria by some authors. Plants typically have lobed leaves that are composed of one to three opposite pairs cut almost to
6-525: Is a tribe of flowering plants in the subfamily Asteroideae , which is part of the family Asteraceae . They are distributed worldwide , with concentrations in central Asia , the Mediterranean Basin , and southern Africa . Most species of plant known as chamomile belong to genera of this tribe. As of 2006 there were about 1800 species classified in 111 genera . In 2007 the tribe was divided into 14 subtribes, including Glebionidinae ,
9-449: The leaf mid rib: they have indehiscent one-celled fruits that have 3-ribs and two resinous glands at the base, Matricaria species are distinguished from these species by lacking fruits with 3-ribs and the two glands. There are approximately 40 species recognised in the genus Tripleurospermum : The genus is closely related to Heteromera , Matricaria , and Pyrethrum . Anthemideae About 111, see text Anthemideae
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