Compilation
Tripleurospermum maritimum

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Name

Identification
Chrysanthemum inodorum (L.) L. [family ASTERACEAE ] (stored under name); Verified by Not on sheet, Matricaria inodora L. [family ASTERACEAE ] Verified by Not on sheet, Tripleurospermum maritimum (L.) W.D.J.Koch [family ASTERACEAE ] Verified by Not on sheet,
Related name
  • Matricaria inodora
  • Matricaria maritima
  • Tripleurospermum maritimum
  • Chrysanthemum inodorum
Common name
  • Seashore or wild chamomile, Flora of North America Vol. 19
  • False chamomile, Flora of North America Vol. 19
  • matricaire à capitules brunâtres, Flora of North America Vol. 19
  • False mayweed, Flora of North America Vol. 19
  • matricaire inodore, Flora of North America Vol. 19
  • matricaire maritime, Flora of North America Vol. 19
  • false chamomile, Flora of North America Vol. 19
  • Scentless or false mayweed, Flora of North America Vol. 19

Flora

Entry for Tripleurospermum inodorum ( Linnaeus) Schultz-Bipontinus [family COMPOSITAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 19,
Names
Tripleurospermum inodorum ( Linnaeus) Schultz-Bipontinus [family COMPOSITAE], Tanaceteen, 32. 1844
Matricaria inodora Linnaeus [family COMPOSITAE], Fl. Suec. ed., 2, 297. 1755
Chamomilla inodora (Linnaeus) K. Koch [family ]
M. maritima Linnaeus var. agrestis (Knaf) Wilmott [family ]
M. maritima subsp. inodora (Linnaeus) Soó [family ]
M. maritima var. inodora (Linnaeus) Soó [family ]
M. perforata Mérat [family ]
Tripleurospermum maritimum (Linnaeus) W. D. J. Koch subsp. inodorum (Linnaeus) Applequist [family COMPOSITAE]
Tripleurospermum perforatum (Mérat) M. Lainz [family COMPOSITAE]
Treatment Author(s)
Luc Brouillet
Information
Annuals (sometimes biennials or perennials), (5–)30–60(–80) cm. Stems 1, ascending to erect, usually branched distally, sometimes proximally, glabrous or glabrate (sparsely hairy when young). Leaf blades 2–8 cm, ultimate lobes filiform, 4–20 mm, not fleshy, apices apiculate. Heads (1–)10–200+, 3–4.5 cm diam., in corymbiform arrays of solitary heads at ends of branches. Phyllaries centrally dark greenish or brownish, oblong, subequal, scarious margins colorless to light brown, 0.1–0.2 mm wide. Ray florets 10–25; corollas (4–)10–13(–20) mm. Disc corollas 1–2.5 mm. Cypselae pale brown, ribs separated by 1/3+ their widths, abaxial-apical resin glands ± circular, faces minutely roughened between ribs. 2n = 18, 36.
Phenology
may (spring), jun-aug (summer), sep (fall)
Altitude range
0–1500+ m;
Distribution
Greenlandalso introduced in EuropePacific Islands (New Zealand).USA Ala.USA AlaskaUSA Calif.USA Colo.USA Conn.USA Fla.USA IdahoUSA Ill.USA IowaUSA Kans.USA Ky.USA MaineUSA Md.USA Mass.USA Mich.USA Minn.USA Mo.USA Mont.USA Nebr.USA Nev.USA N.H.USA N.J.USA N.Y.USA N.Dak.USA OhioUSA Oreg.USA Pa.USA S.Dak.USA UtahUSA Wash.USA Wis.USA Wyo.Canada Alta.Canada B.C.Canada Man.Canada N.B.Canada Nfld. and Labr.Canada N.W.T.Canada N.S.Canada Ont.Canada P.E.I.Canada Que.Canada Sask.Canada Yukon
Discussion
Tripleurospermum inodorum has been classified as a noxious weed (class C) in the state of Washington and is considered invasive in other states (it is resistant to some herbicides); it is a weed of cereals in western Canada. W. L. Applequist (2002) has shown that the name Matricaria inodora is not a superfluous new name for M. chamomilla as earlier stated by S. Rauschert (1974). Therefore, the appropriate name under Tripleuro-spermum is T. inodorum. She also considered its type to belong in T. maritimum and formally recognized it there as subsp. inodorum, on the basis of hybridization with other T. maritimum subspecies (A. Vaarama 1953); on the same basis, however, Hämet-Ahti maintained the species distinction between T. inodorum and T. maritimum, while making T. phaeocephalum a subspecies of the latter. Q. O. N. Kay (1994), in a more extensive review of the literature and of hybridization data, also maintained T. inodorum and T. maritimum as distinct species, a conclusion followed here. From the standpoint of weed science, taxonomic merging of T. inodorum and T. maritimum has the inconvenience of grouping under a single specific name taxa that have different physiologies, ecologies, weed potentials, and, possibly, reactions to weed control measures.
The name Matricaria inodora var. agrestis Weiss was not validly published.
Native/Introduced
introduced;

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