View source for Rapistrum

{{Treatment/ID
|accepted_name=Rapistrum
|accepted_authority=Crantz
|publications={{Treatment/Publication
|title=Cl. Crucif. Emend.,
|place=105. 1769
|year=1769
}}
|common_names=Wild-turnip;turnipweed
|basionyms=
|synonyms=
|hierarchy=Brassicaceae;Brassicaceae tribe Brassiceae;Rapistrum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Brassicaceae]]</div><div class="higher-taxon"><small>tribe</small>[[Brassicaceae tribe Brassiceae]]</div><div class="higher-taxon"><small>genus</small>[[Rapistrum]]</div></div>
|etymology=Latin rapa, turnip, and -astrum, incomplete resemblance
|volume=Volume 7
|mention_page=page 232, 238, 441
|treatment_page=page 440
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals </b>[perennials]; not scapose; glabrous or pubescent. <b>Stems</b> erect, unbranched or branched basally. <b>Leaves</b> basal and cauline; petiolate or subsessile; basal not rosulate, petiolate, blade margins usually pinnate to lyrately pinnatifid, rarely undivided, dentate; cauline subsessile or shortly petiolate, blade (base not auriculate), margins lobed, subentire, or dentate. <b>Racemes</b> (corymbose, several-flowered), greatly elongated in fruit. <b>Fruiting</b> pedicels erect [ascending], (usually appressed to rachis), slender to stout. <b>Flowers</b>: sepals ascending, oblong, lateral pair not saccate basally, (hispid [glabrous or with subapical tuft of hairs]); petals yellow, obovate, claw differentiated from blade, (apex ± truncate); stamens tetradynamous; filaments not dilated basally; anthers ovate to suboblong, (apex obtuse); nectar glands confluent, median glands present. <b>Fruits</b> silicles, indehiscent, sessile, segments 2, elliptic to oblong, torulose, (slightly to strongly constricted at transverse joint), terete or angular; (valvular segment persistent, dehiscent [indehiscent], 1(–3)-seeded, longitudinally striate or smooth, occasionally seedless and nearly as wide as pedicel; terminal segment indehiscent, caducous at maturity, usually 1-seeded, rarely seedless); valves glabrous or pubescent; septum complete; ovules 2–4; (style persistent, filiform); stigma capitate, (flattened), 2-lobed. <b>Seeds</b> uniseriate, slightly compressed, not winged, ovoid [oblong]; seed coat (smooth), not mucilaginous when wetted; cotyledons conduplicate. <b>x</b> = 8.</span><!--

-->{{Treatment/Body
|distribution=s Europe (Mediterranean region);introduced also nearly worldwide.
|discussion=<p>Species 2 (1 in the flora).</p><!--
--><p>Both species of <i>Rapistrum</i> have been introduced into North America; only <i>R. rugosum</i> has persisted with naturalized populations. <i>Rapistrum</i> perenne (Linnaeus) Allioni was first collected in 1922 from southeastern Saskatchewan but has not been seen or collected from there since 1932. It can be distinguished by being a perennial with a conical style shorter than the strongly 8-ribbed terminal segment, whereas <i>R. rugosum</i> is an annual with a slender, filiform style longer than the slightly ribbed terminal segment.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Rapistrum
|author=Suzanne I. Warwick
|authority=Crantz
|rank=genus
|parent rank=tribe
|synonyms=
|basionyms=
|family=Brassicaceae
|distribution=s Europe (Mediterranean region);introduced also nearly worldwide.
|introduced=true
|reference=None
|publication title=Cl. Crucif. Emend.,
|publication year=1769
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V7/V7_664.xml
|tribe=Brassicaceae tribe Brassiceae
|genus=Rapistrum
}}<!--

-->[[Category:Treatment]][[Category:Brassicaceae tribe Brassiceae]]