View source for Lepidium oblongum

{{Treatment/ID
|accepted_name=Lepidium oblongum
|accepted_authority=Small
|publications={{Treatment/Publication
|title=Fl. S.E. U.S.,
|place=468, 1331. 1903
|year=1903
}}
|special_status={{Treatment/ID/Special_status
|code=W
|label=Weedy
}}{{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Lepidium greenei
|authority=Thellung
|rank=species
}} {{Treatment/ID/Synonym
|name=Lepidium oblongum var. insulare
|authority=C. L. Hitchcock
|rank=variety
}}
|hierarchy=Brassicaceae;Brassicaceae tribe Lepidieae;Lepidium;Lepidium oblongum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Brassicaceae]]</div><div class="higher-taxon"><small>tribe</small>[[Brassicaceae tribe Lepidieae]]</div><div class="higher-taxon"><small>genus</small>[[Lepidium]]</div><div class="higher-taxon"><small>species</small>[[Lepidium oblongum]]</div></div>
|volume=Volume 7
|mention_page=page 571, 573, 589
|treatment_page=page 588
}}<!--

--><span class="statement" id="st-undefined" data-properties="">Annuals; hirsute (trichomes cylindrical). <b>Stems</b> often several from base, erect to ascending or decumbent, branched distally, (5–)1–2.4(–3.2) dm. <b>Basal</b> leaves not rosulate; petiole (0.5–)1–3 cm; blade 1- or 2-pinnatifid, 0.7–3.5 cm, margins (of lobes) entire or dentate. <b>Cauline</b> leaves usually sessile, rarely shortly petiolate; blade obovate to oblanceolate (in outline), 0.8–2 cm × 2–9 mm, base cuneate, auriculate or not, margins dentate to laciniate or pinnatifid. <b>Racemes</b> elongated in fruit; rachis hirsute, trichomes mostly straight, cylindrical. <b>Fruiting</b> pedicels divaricate to horizontal, usually slightly recurved, rarely straight, (terete), 2–3.5(–5) × 0.2–0.3 mm, puberulent adaxially or, rarely, throughout. <b>Flowers</b>: sepals (tardily deciduous to somewhat persistent), ovate to broadly oblong, 0.7–1 × 0.4–0.6 mm; petals (absent or rudimentary), white, linear-oblanceolate, 0.1–0.7 × 0.05–0.15 mm, claw absent; stamens 2, median; filaments 0.7–1 mm; anthers 0.15–0.2 mm. <b>Fruits</b> orbicular to broadly obovate or elliptic, 2.2–3.5 × 2–3 mm, apically winged, apical notch 0.2–0.3 mm deep; valves thin, smooth, not veined, glabrous or sparsely puberulent (along margin); style to 0.1 mm, included in apical notch. <b>Seeds</b> ovate, 1.2–1.6 × 0.7–1 mm.</span><!--

-->{{Treatment/Body
|phenology=Flowering Mar–Aug.
|habitat=Prairies, pastures, floodplains, waste grounds, llanos, disturbed areas, roadsides, flats, calcareous sand, alluvial terraces
|elevation=0-1200 m
|distribution=Ariz.;Ark.;Calif.;Kans.;La.;Miss.;Mo.;N.Mex.;Okla.;Tex.;Mexico (Baja California;Coahuila;Hidalgo;Nuevo León;Puebla;San Luis Potosí;Tamascaltepec;Veracruz);Central America (El Salvador;Guatemala).
|discussion=<p>Hitchcock distinguished <i></i>var.<i> insulare</i> from var. oblongum on the basis of having fruits smaller (2–2.5 versus 2.5–3 mm) and rotund to obovate (versus elliptic or obovate-elliptic) and fruiting pedicels puberulent (versus glabrous) abaxially. The shape and size of fruits almost never covary, and some of the insular plants (e.g., Trask 28, GH) have the largest fruits; some populations from Arizona, Oklahoma, and Texas have smaller and perfectly orbicular fruits. As for the pubescence of fruiting pedicels, some of the inland plants cited by Hitchcock as <i>L. oblongum</i> (e.g., Brewer 27, GH) have pedicels pubescent abaxially.</p><!--
--><p>A recent report of <i>Lepidium</i> bonariense naturalized in Skagit County, Washington, was based on misidentified <i>L. oblongum</i>; all the vouchers for it belong to the latter species. <i>Lepidium oblongum</i> often has several stems from base, usually auriculate distalmost leaves, and fruits 2–3 mm wide. By contrast, L. bonariense has single stems from base, non-auriculate distalmost leaves, and fruits 2.7–3.5 mm wide.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Lepidium oblongum
|authority=Small
|rank=species
|parent rank=genus
|synonyms=Lepidium greenei;Lepidium oblongum var. insulare
|basionyms=
|family=Brassicaceae
|phenology=Flowering Mar–Aug.
|habitat=Prairies, pastures, floodplains, waste grounds, llanos, disturbed areas, roadsides, flats, calcareous sand, alluvial terraces
|elevation=0-1200 m
|distribution=Ariz.;Ark.;Calif.;Kans.;La.;Miss.;Mo.;N.Mex.;Okla.;Tex.;Mexico (Baja California;Coahuila;Hidalgo;Nuevo León;Puebla;San Luis Potosí;Tamascaltepec;Veracruz);Central America (El Salvador;Guatemala).
|reference=None
|publication title=Fl. S.E. U.S.,
|publication year=1903
|special status=Weedy;Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V7/V7_952.xml
|tribe=Brassicaceae tribe Lepidieae
|genus=Lepidium
|species=Lepidium oblongum
}}<!--

-->[[Category:Treatment]][[Category:Lepidium]]