View source for Descurainia paradisa

{{Treatment/ID
|accepted_name=Descurainia paradisa
|accepted_authority=(A. Nelson & P. B. Kennedy) O. E. Schulz
|publications={{Treatment/Publication
|title=in H. G. A. Engler, Pflanzenr.
|place=86[IV,105]: 331. 1924
|year=1924
}}
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Sophia paradisa
|authority=A. Nelson & P. B. Kennedy
|rank=species
|publication_title=Proc. Biol. Soc. Wash.
|publication_place=19: 155. 1906
}}
|synonyms={{Treatment/ID/Synonym
|name=Descurainia paradisa subsp. nevadensis
|authority=Rollins
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=Descurainia paradisa var. nevadensis
|authority=(Rollins) N. H. Holmgren
|rank=variety
}} {{Treatment/ID/Synonym
|name=Descurainia pinnata subsp. paradisa
|authority=(A. Nelson & P. B. Kennedy) Detling
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=Descurainia pinnata var. paradisa
|authority=(A. Nelson & P. B. Kennedy) M. Peck
|rank=variety
}} {{Treatment/ID/Synonym
|name=Sisymbrium paradisum
|authority=
|rank=species
}}
|hierarchy=Brassicaceae;Brassicaceae tribe Descurainieae;Descurainia;Descurainia paradisa
|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 paradisa]]</div></div>
|volume=Volume 7
|mention_page=page 519, 520, 525
|treatment_page=page 526
}}<!--

--><span class="statement" id="st-undefined" data-properties="">Annuals; glandular or eglandular; sparsely to densely pubescent, trichomes dendritic. <b>Stems</b> erect, branched basally and distally, (often purplish), (1–)1.5–3.2(–4.1) dm. <b>Basal</b> leaves (soon withered); petiole 0.3–1.3 cm; blade pinnate, oblanceolate to obovate in outline, 1.5–3 cm, lateral lobes oblong to linear or lanceolate, (1–5 × 0.3–1 mm), margins entire or dentate. <b>Cauline</b> leaves sessile; blade smaller distally, distal lobes often narrower, surfaces moderately to densely pubescent. <b>Racemes</b> considerably elongated in fruit. <b>Fruiting</b> pedicels divaricate to ascending, straight, 2.5–7(–9) mm. <b>Flowers</b>: sepals spreading to ascending, pale yellow, oblong, 0.8–1.2 mm, pubescent; petals oblanceolate, 0.9–1.3 × 0.2–0.5 mm; median filaments 0.8–1.2 mm; anthers 0.1–0.2 mm. <b>Fruits</b> divaricate to erect, usually obovoid to clavate, rarely broadly ellipsoid, not torulose, 2–5 × 1–2 mm, (acute basally, obtuse apically); valves each with obscure midvein; septum not veined; ovules 4–10 per ovary; style 0.05–0.3 mm, glabrous. <b>Seeds</b> uniseriate or biseriate, brown, oblong, 0.8–1.2 × 0.5–0.6 mm.</span><!--

-->{{Treatment/Body
|phenology=Flowering Apr–Jun.
|habitat=Shrub communities, sandy washes and dunes, roadsides
|elevation=1000-2300 m
|distribution=Calif.;Nev.;Oreg.
|discussion=<p>Although L. E. Detling (1939) reduced <i>Descurainia paradisa</i> to a subspecies of <i>D. pinnata</i>, molecular data (B. E. Goodson 2007) clearly show that it should not be included in that species. The boundaries of <i>D. paradisa</i> in its northern and southern ranges tend to be blurred relative to <i>D. nelsonii</i> and <i>D. pinnata</i>, respectively.</p><!--
--><p>R. C. Rollins (1993) and N. H. Holmgren (2005b) recognized some of the <i>Nevada</i> plants of <i>Descurainia paradisa</i> that have eglandular racemes as a subspecies and variety (nevadensis), respectively. This poorly delimited division of the species is artificial, and both glandular and eglandular forms are sometimes found within individual populations of most species. They also indicated that nevadensis has styles 0.2–0.3 mm (versus 0.05–0.15 mm in <i>D. paradisa</i>), but this distinction is equally unreliable. Indeed, the style length and the presence versus absence of glands are not inherited together. Some of the eglandular plants have styles to 0.1 mm (e.g., Williams & Tiehm 86-51-1, GH). It is likely that some of the plants identified as nevadensis are of hybrid origin involving other species, especially <i>D. nelsonii</i>.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Descurainia paradisa
|authority=(A. Nelson & P. B. Kennedy) O. E. Schulz
|rank=species
|parent rank=genus
|synonyms=Descurainia paradisa subsp. nevadensis;Descurainia paradisa var. nevadensis;Descurainia pinnata subsp. paradisa;Descurainia pinnata var. paradisa;Sisymbrium paradisum
|basionyms=Sophia paradisa
|family=Brassicaceae
|phenology=Flowering Apr–Jun.
|habitat=Shrub communities, sandy washes and dunes, roadsides
|elevation=1000-2300 m
|distribution=Calif.;Nev.;Oreg.
|reference=None
|publication title=in H. G. A. Engler, Pflanzenr.
|publication year=1924
|special status=Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V7/V7_829.xml
|tribe=Brassicaceae tribe Descurainieae
|genus=Descurainia
|species=Descurainia paradisa
}}<!--

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