View source for Chaenorhinum minus subsp. minus

{{Treatment/ID
|accepted_name=Chaenorhinum minus subsp. minus
|accepted_authority=
|publications=
|special_status={{Treatment/ID/Special_status
|code=W
|label=Weedy
}}{{Treatment/ID/Special_status
|code=I
|label=Introduced
}}{{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms=
|synonyms=
|hierarchy=Plantaginaceae;Chaenorhinum;Chaenorhinum minus;Chaenorhinum minus subsp. minus
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Plantaginaceae]]</div><div class="higher-taxon"><small>genus</small>[[Chaenorhinum]]</div><div class="higher-taxon"><small>species</small>[[Chaenorhinum minus]]</div><div class="higher-taxon"><small>subspecies</small>[[Chaenorhinum minus subsp. minus]]</div></div>
|volume=Volume 17
|mention_page=page 19
|treatment_page=page 18
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>much-branched from or near base, sometimes unbranched, often zig-zag, (4–)8–28(–40) cm. <b>Leaves</b>: blade 5–15(–30) × 1–4(–5) mm, base tapered, apex obtuse to acute, surfaces glandular-pubescent. <b>Pedicels</b> ascending. <b>Flowers</b>: calyx lobes accrescent, abaxial 1.5–2.5 × 0.3–0.4 mm, adaxial 2.8–3.5 × 0.4–0.8 mm, margins entire, apex obtuse; corolla 8–11 mm (including 1–2.3 mm spur), sparsely glandular-pubescent externally, glandular-pubescent internally on abaxial surface, especially along ridges of palate and into throat, throat 2–3 mm diam., abaxial lobes spreading, adaxial projecting; stamens included, anthers opposite, navicular, marginally coherent, pollen sacs of longer pair of stamens 0.3–0.4 mm, of shorter pair of stamens 0.1–0.2 mm, glabrous; ovary glandular-pubescent; style 1.5–2 mm, glandular-pubescent proximally. <b>Capsules</b> obovoid to ellipsoid, 4–5.4 × 2–3.6 mm, glandular-pubescent distally. <b>Seeds</b> 0.6–0.9 mm, prominently ribbed longitudinally. <b>2n</b> = 14, 28 (both Europe).</span><!--

-->{{Treatment/Body
|phenology=Flowering May–Oct.
|habitat=Gravelly railroad rights-of-way, road shoulders, urban areas, stream beds.
|elevation=0–1600 m.
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Ont.;P.E.I.;Que.;Sask.;Ala.;Ark.;Colo.;Conn.;Del.;Ga.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Minn.;Mo.;Mont.;Nebr.;N.H.;N.J.;N.Y.;N.C.;N.Dak.;Ohio;Okla.;Oreg.;Pa.;R.I.;Tenn.;Tex.;Vt.;Va.;Wash.;W.Va.;Wis.;Europe;sw Asia;introduced also in e Asia (Russian Far East).
|introduced=true
|discussion=<p>Subspecies minus is the only member of <i>Chaenorhinum minus</i> to have become widely established as a weed; the other three subspecies occur in Europe, one each in Corsica, Crete, and Turkey.</p><!--
--><p>First collected in Camden, New Jersey (1874), and St. John, New Brunswick (1881), <i>Chaenorhinum minus</i> likely came to North America as a contaminant in ship ballast, with subsequent dispersal along railroad lines (M. P. Widrlechner 1983). R. M. Arnold (1981, 1982) noted that self-compatibility, a short generation time, drought tolerance, and seed dispersal enhanced by passing trains allowed <i>C. minus</i> to be a successful colonizer of railroad rights-of-way, where it was once common but is now scarce because of herbicide use.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Chaenorhinum minus subsp. minus
|authority=
|rank=subspecies
|parent rank=species
|synonyms=
|basionyms=
|family=Plantaginaceae
|phenology=Flowering May–Oct.
|habitat=Gravelly railroad rights-of-way, road shoulders, urban areas, stream beds.
|elevation=0–1600 m.
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Ont.;P.E.I.;Que.;Sask.;Ala.;Ark.;Colo.;Conn.;Del.;Ga.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Minn.;Mo.;Mont.;Nebr.;N.H.;N.J.;N.Y.;N.C.;N.Dak.;Ohio;Okla.;Oreg.;Pa.;R.I.;Tenn.;Tex.;Vt.;Va.;Wash.;W.Va.;Wis.;Europe;sw Asia;introduced also in e Asia (Russian Far East).
|introduced=true
|reference=None
|publication title=
|publication year=
|special status=Weedy;Introduced;Illustrated
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V17/V17_87.xml
|genus=Chaenorhinum
|species=Chaenorhinum minus
|subspecies=Chaenorhinum minus subsp. minus
}}<!--

-->[[Category:Treatment]][[Category:Chaenorhinum minus]]