View source for Tripleurospermum maritimum subsp. inodorum

{{SPlantbox
|genus=Tripleurospermum
|species=maritimum
|subspecies=inodorum
|Min ht metric=cm
|Temp Metric=°F
|jumpin=This is the plant information box - for information on light; water; zones; height; etc. If it is mostly empty you can help grow this page by clicking on the edit tab and filling in the blanks!
|image=Tripleurospermum perforatum 20041012 2572.jpg
|image_width=180
}}
'''''Matricaria perforata''''' is a species of [[Mayweed]].

The taxonomy of the genus [[Mayweed|Matricaria]] has been the subject of some controversy, with many revisions in recent years. The [[Flora Europaea]] uses ''Matricaria perforata'' for this species. Synonyms/other scientific names include ''Tripleurospermum perforatum'' (Mérat) Lainz, ''Tripleurospermum maritimum'' subsp. ''inodorum'', ''Tripleurospermum inodorum''. 

Common name(s): scentless mayweed, scentless chamomile, wild chamomile, mayweed, false chamomile, German chamomile, [[Baldr]]'s Brow 

Origin Eurasia, North Africa 

Considered an invasive weed in North America

{{Inc|
Matricaria chamomilla, Linn. (Chamomilla officinalis, Koch). Wild Chamomile. Glabrous erect much- branched annual: lvs. 2-3-pinnate, with segms. short and very narrow-linear, giving the lf. a finely dissected appearance: heads rather large (nearly 1 in. across), on terminal peduncles, with 10-20 truncate white rays; bracts of involucre of about equal length, the edges scarious; receptacle without scales, elongating and hollow as anthesis advances: achene with 3-5 faint ribs and no border at top. Fields, Eu. and N. Asia; run wild in E. U. S.—Very similar in appearance to Anthemis Cotula, but lacks the scales between the central florets and has a different odor. The name chamomile, or sometimes spelled camomile, is applied both in Matricaria and Anthemis.
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{{Inc|
Matricaria inodora, Linn. (Chrysanthemum inodorum, Linn. Pyrethrum inodorum, Smith). Nearly or quite glabrous, branchy, diffuse annual, 1-2 ft. tall, from Eu. and Asia: lvs. many, sessile, 2-3-pinnately divided or dissected: heads 1½in. across, terminating the branches, with many acute white rays: achenes inversely pyramidal, with 3 conspicuous ribs. Not uncommon in fields eastward. Var. plenissima, Hort. (var. ligulosa, var. multiplex, M. grandiflora, Hort. not Fenzl), ia a common garden plant with very double clear white large heads. It is floriferous, and the fls. are fine for cutting.—It often persists and blooms the second year. Foliage little or not at all scented.
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