View source for Lepidium ramosissimum

{{Treatment/ID
|accepted_name=Lepidium ramosissimum
|accepted_authority=A. Nelson
|publications={{Treatment/Publication
|title=Bull. Torrey Bot. Club
|place=26: 124. 1899
|year=1899
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Lepidium bourgeauanum
|authority=Thellung
}} {{Treatment/ID/Synonym
|name=Lepidium densiflorum var. bourgeauanum
|authority=(Thellung) C. L. Hitchcock
}} {{Treatment/ID/Synonym
|name=Lepidium divergens
|authority=Osterhout
}} {{Treatment/ID/Synonym
|name=Lepidium fletcheri
|authority=Rydberg
}} {{Treatment/ID/Synonym
|name=Lepidium ramosissimum var. bourgeauanum
|authority=(Thellung) Rollins
}} {{Treatment/ID/Synonym
|name=Lepidium ramosissimum var. divergens
|authority=(Osterhout) Rollins
}} {{Treatment/ID/Synonym
|name=Lepidium ramosissimum var. robustum
|authority=Thellung
}}
|hierarchy=Brassicaceae;Brassicaceae tribe Lepidieae;Lepidium;Lepidium ramosissimum
|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 ramosissimum]]</div></div>
|volume=Volume 7
|mention_page=page 571, 573
|treatment_page=page 591
}}<!--

--><span class="statement" id="st-undefined" data-properties="">Perennials; puberulent, (trichomes cylindrical). <b>Stems</b> simple from base, erect, branched (several) distally, (0.6–)1–5.3(–7.7) dm. <b>Basal</b> leaves (soon withered); not rosulate; petiole 1–4 cm; blade oblanceolate or pinnatifid, 2–5 cm × 8–15 mm, margins (of lobes) entire serrate or dentate. <b>Cauline</b> leaves shortly petiolate or sessile; blade oblanceolate or (distal) linear, (0.6–)1.2–4.8(–6) cm × 1–8(–10) mm, base attenuate to cuneate, not auriculate, margins dentate, (distal) entire, or, rarely, lobed. <b>Racemes</b> slightly elongated in fruit; rachis puberulent, trichomes curved, cylindrical to subclavate. <b>Fruiting</b> pedicels divaricate-ascending to horizontal, straight or recurved, (terete), (1.6–)2–3.8(–5) × 0.2–0.3 mm, usually puberulent adaxially, rarely throughout. <b>Flowers</b>: sepals oblong, 0.6–0.9(–1.1) × 0.3–0.4 mm; petals (absent or rudimentary), white, linear, 0.2–0.8(–1) × 0.05–0.1 mm, claw absent; stamens 2, median; filaments 0.6–0.9 mm; anthers 0.15–0.2 mm. <b>Fruits</b> elliptic, 2.2–3.2 × 1.7–2.1mm, apically winged, apical notch 0.1–0.3(–0.4) mm deep; valves thin, smooth, not veined, glabrous or puberulent at least along margin; style usually obsolete, rarely to 0.1 mm, included in apical notch. <b>Seeds</b> oblong, 1.2–1.6 × 0.8–0.9 mm. <b>2n</b> = 32, 64.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Aug.
|habitat=Sagebrush communities, pine woodlands, waste grounds, roadsides, railroad embankments, alkaline flats, abandoned fields
|elevation=0-2900 m
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;Ont.;Que.;Sask.;Yukon;Alaska;Calif.;Colo.;Idaho;Maine;Minn.;Mont.;Nebr.;Nev.;N.Mex.;N.Dak.;S.Dak.;Tex.;Utah;Wyo.;Mexico (Chihuahua).
|discussion=<p>As noted by R. C. Rollins (1993, p. 581), the varieties of <i>Lepidium ramosissimum</i> are “weak at best.” They are based largely on the branching habit and, most importantly, on the presence versus absence of trichomes on the fruit valve. In some collections (e.g., Scoggan 4233, GH; Boivin et al., 13221, GH), both puberulent- and glabrous-fruited forms occur. It is almost certain that the same situation exists not only in other populations of this species, but in other North American <i>Lepidium</i>. It is also clear that some populations might consist entirely of one of the two forms, but it is highly unlikely that this variation has any geographical basis. Therefore, we believe that the separation of varieties solely on the basis of presence or absence of the fruit trichomes is taxonomically meaningless.</p><!--
--><p>We are reluctantly including <i>Lepidium</i> divergens in the synonymy of <i>L. ramosissimum</i> because we have not seen its type; the topotypes that we studied have broadly obovate to suborbicular fruits that appear more at home in the <i>L. densiflorum</i> or <i>L. virginicum</i> complexes.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Lepidium ramosissimum
|author=
|authority=A. Nelson
|rank=species
|parent rank=genus
|synonyms=Lepidium bourgeauanum;Lepidium densiflorum var. bourgeauanum;Lepidium divergens;Lepidium fletcheri;Lepidium ramosissimum var. bourgeauanum;Lepidium ramosissimum var. divergens;Lepidium ramosissimum var. robustum
|basionyms=
|family=Brassicaceae
|phenology=Flowering Jun–Aug.
|habitat=Sagebrush communities, pine woodlands, waste grounds, roadsides, railroad embankments, alkaline flats, abandoned fields
|elevation=0-2900 m
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;Ont.;Que.;Sask.;Yukon;Alaska;Calif.;Colo.;Idaho;Maine;Minn.;Mont.;Nebr.;Nev.;N.Mex.;N.Dak.;S.Dak.;Tex.;Utah;Wyo.;Mexico (Chihuahua).
|reference=None
|publication title=Bull. Torrey Bot. Club
|publication year=1899
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V7/V7_959.xml
|tribe=Brassicaceae tribe Lepidieae
|genus=Lepidium
|species=Lepidium ramosissimum
}}<!--

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