Tripleurospermum

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Tripleurospermum is a genus in the chamomile tribe within the sunflower family.[1][2] Mayweed is a common name for plants in this genus.[3]

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.[4][5][6]

Plants typically have lobed leaves that are composed of one to three opposite pairs cut almost to 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.[7]

Species

There are approximately 40 species recognised in the genus Tripleurospermum:[8]

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Formerly included

The genus is closely related to Heteromera, Matricaria, and Pyrethrum.[9]

References

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  1. Schultz, Carl Heinrich Ġinus. 1844. Ueber die Tanaceteen: mit besonderer Berücksichtigung der deutschen Arten 31–34
  2. Tropicos, Tripleurospermum Sch. Bip.
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  4. Flora of North America Vol. 19, 20 and 21 Page 548, Tripleurospermum Schultz-Bipontinus, Tanaceteen. 31. 1844.
  5. Flora of China Vol. 20-21 Page 769 三肋果属 san lei guo shu Tripleurospermum Schultz Bipontinus, Tanaceteen. 31. 1844.
  6. Altervista Flora Italilana, Camomilla senza odore, Tripleurospermum inodorum (L.) Sch. Bip. includes photos and distribution maps
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External links

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