Difference between revisions of "Tripleurospermum maritimum"
Syn. Fl. Germ. Helv. ed. 2, 1026. 1845.
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| − | |distribution= | + | |distribution=Man.;N.B.;N.S.;N.W.T.;Nfld. and Labr. (Nfld.);Nunavut;Ont.;Que.;Yukon;Alaska;Calif.;Maine;Mass.;Pa.;Eurasia. |
|discussion=<p>Subspecies 3 (2 in the flora).</p> | |discussion=<p>Subspecies 3 (2 in the flora).</p> | ||
|tables= | |tables= | ||
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|basionyms=Matricaria maritima | |basionyms=Matricaria maritima | ||
|family=Asteraceae | |family=Asteraceae | ||
| − | |distribution= | + | |distribution=Man.;N.B.;N.S.;N.W.T.;Nfld. and Labr. (Nfld.);Nunavut;Ont.;Que.;Yukon;Alaska;Calif.;Maine;Mass.;Pa.;Eurasia. |
|reference=None | |reference=None | ||
|publication title=Syn. Fl. Germ. Helv. ed. | |publication title=Syn. Fl. Germ. Helv. ed. | ||
|publication year=1845 | |publication year=1845 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V19_957.xml |
|tribe=Asteraceae tribe Anthemideae | |tribe=Asteraceae tribe Anthemideae | ||
|genus=Tripleurospermum | |genus=Tripleurospermum | ||
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Latest revision as of 18:19, 6 November 2020
Perennials (sometimes biennials), 10–50(–80) cm. Stems 1–5+, usually procumbent, sometimes ascending (± erect), branched distally, glabrous or sparsely hairy. Leaf blades 2–8 cm, ultimate lobes ± cylindric, 4–20 mm, ± fleshy, apices obtuse or mucronate. Heads (3–)10–50 in corymbiform arrays or borne singly. Phyllaries centrally dark greenish or brownish, oblong to narrowly triangular or broadly triangular, unequal, scarious margins pale to dark brown or blackish brown, 0.2–1 mm wide. Ray florets 10–34+; corollas 10–16[–20] mm. Disc corollas ca. 2.5 mm. Cypselae pale to dark blackish brown, ribs ± contiguous or separated by less than 1/4 their widths (1–2 supernumerary ribs sometimes present), abaxial-apical resin glands elongate (lengths 2+ times widths), abaxial faces transversely rugose, minutely roughened on faces and between ribs. 2n = 18, 36.
Distribution
Man., N.B., N.S., N.W.T., Nfld. and Labr. (Nfld.), Nunavut, Ont., Que., Yukon, Alaska, Calif., Maine, Mass., Pa., Eurasia.
Discussion
Subspecies 3 (2 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Phyllaries oblong or narrowly triangular, scarious margins pale to dark brown, 0.2–0.4 mm wide; cypselae: resin gland lengths often much more than twice widths; coastal ne North America | Tripleurospermum maritimum subsp. maritimum |
| 1 | Phyllaries broadly triangular, scarious margins blackish brown, 0.4–1 mm wide; cypselae: resin gland lengths usually little more than twice widths; coastal arctic | Tripleurospermum maritimum subsp. phaeocephalum |