View source for Descurainia sophia

{{Treatment/ID
|accepted_name=Descurainia sophia
|accepted_authority=(Linnaeus) Webb ex Prantl in H. G. A. Engler and K. Prantl
|publications={{Treatment/Publication
|title=in H. G. A. Engler and K. Prantl, Nat. Pflanzenfam.
|place=55(III,2): 192. 1891
|year=1891
}}
|common_names=Flixweed;tansy mustard
|basionyms={{Treatment/ID/Basionym
|name=Sisymbrium sophia
|authority=Linnaeus
|publication_title=Sp. Pl.
|publication_place=2: 659. 1753
}}
|synonyms={{Treatment/ID/Synonym
|name=Hesperis sophia
|authority=(Linnaeus) Kuntze
}} {{Treatment/ID/Synonym
|name=Sisymbrium parviflorum
|authority=Lamarck
}} {{Treatment/ID/Synonym
|name=Sophia parviflora
|authority=(Lamarck) Standley
}}
|hierarchy=Brassicaceae;Brassicaceae tribe Descurainieae;Descurainia;Descurainia sophia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Brassicaceae]]</div><div class="higher-taxon"><small>tribe</small>[[Brassicaceae tribe Descurainieae]]</div><div class="higher-taxon"><small>genus</small>[[Descurainia]]</div><div class="higher-taxon"><small>species</small>[[Descurainia sophia]]</div></div>
|volume=Volume 7
|mention_page=page 518, 520
|treatment_page=page 528
}}<!--

--><span class="statement" id="st-undefined" data-properties="">Annuals; eglandular; sparsely to densely pubescent, sometimes glabrous distally, trichomes dendritic. <b>Stems</b> erect, unbranched or branched distally, (1–)2–7(–10) dm. <b>Basal</b> leaves: petiole 0.1–2(–3) cm; blade 2- or 3-pinnate, ovate or oblong to obovate in outline, to 15 cm, lateral lobes linear or oblong, (to 10 × 2 mm), margins entire. <b>Cauline</b> leaves sessile or shortly petiolate; blade smaller distally, distal lobes often narrower, surfaces often glabrous. <b>Racemes</b> considerably elongated in fruit. <b>Fruiting</b> pedicels divaricate to ascending, straight, (5–)8–15(–20) mm. <b>Flowers</b>: sepals erect to ascending, yellowish, oblong, 1.8–2.8 mm, glabrate to sparsely pubescent; petals narrowly oblanceolate, 2–3 × 0.4–0.6 mm; median filaments 2–3 mm; anthers 0.3–0.4 mm. <b>Fruits</b> divaricate-ascending to erect, narrowly linear, torulose, (12–)15–27(–30) × 0.5–0.8(–1) mm, (straight or curved upward); valves each with distinct midvein; septum with a broad central longitudinal band appearing as 2 or 3 veins; ovules 20–48 per ovary; style obsolete, 0.05–0.2 mm, glabrous. <b>Seeds</b> uniseriate, reddish brown, oblong, 0.7–1.3 × 0.3–0.6 mm. <b>2n</b> = 28.</span><!--

-->{{Treatment/Body
|phenology=Flowering Mar–Jul.
|habitat=Roadsides, waste places, disturbed sites, railroad embankments, hillsides, mountain slopes, canyon bottoms, stream banks, fields, lawns, pastures, deserts, sagebrush and pinyon-juniper communities
|elevation=0-3000 m
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Ariz.;Ark.;Calif.;Colo.;Conn.;Del.;D.C.;Ga.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Mass.;Mich.;Minn.;Mo.;Mont.;Nebr.;Nev.;N.H.;N.Mex.;N.Y.;N.C.;N.Dak.;Okla.;Oreg.;Pa.;R.I.;S.Dak.;Tenn.;Tex.;Utah;Vt.;Va.;Wash.;W.Va.;Wis.;Wyo.;Eurasia;introduced also in Mexico;Central America;South America;South Africa;Australia.
|discussion=<p>Deviant chromosome counts (e.g., 2n = 12, 14, 20, 38; see R. C. Rollins 1993, N. H. Holmgren 2005b, S. I. Warwick and I. A. Al-Shehbaz 2006) are most certainly erroneous, and the species appears to be exclusively tetraploid based on x = 7.</p>
|tables=
|references={{Treatment/Reference
|id=best1977a
|text=Best, K. F. 1977. The biology of Canadian weeds. 22. Descurainia sophia (L.) Webb. Canad. J. Pl. Sci. 57: 499–507.
}}
}}<!--

--><!--

-->{{#Taxon:
name=Descurainia sophia
|author=
|authority=(Linnaeus) Webb ex Prantl in H. G. A. Engler and K. Prantl
|rank=species
|parent rank=genus
|synonyms=Hesperis sophia;Sisymbrium parviflorum;Sophia parviflora
|basionyms=Sisymbrium sophia
|family=Brassicaceae
|phenology=Flowering Mar–Jul.
|habitat=Roadsides, waste places, disturbed sites, railroad embankments, hillsides, mountain slopes, canyon bottoms, stream banks, fields, lawns, pastures, deserts, sagebrush and pinyon-juniper communities
|elevation=0-3000 m
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Ariz.;Ark.;Calif.;Colo.;Conn.;Del.;D.C.;Ga.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Mass.;Mich.;Minn.;Mo.;Mont.;Nebr.;Nev.;N.H.;N.Mex.;N.Y.;N.C.;N.Dak.;Okla.;Oreg.;Pa.;R.I.;S.Dak.;Tenn.;Tex.;Utah;Vt.;Va.;Wash.;W.Va.;Wis.;Wyo.;Eurasia;introduced also in Mexico;Central America;South America;South Africa;Australia.
|introduced=true
|reference=best1977a
|publication title=in H. G. A. Engler and K. Prantl, Nat. Pflanzenfam.
|publication year=1891
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V7/V7_835.xml
|tribe=Brassicaceae tribe Descurainieae
|genus=Descurainia
|species=Descurainia sophia
}}<!--

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