View source for Draba corymbosa

{{Treatment/ID
|accepted_name=Draba corymbosa
|accepted_authority=R. Brown ex de Candolle
|publications={{Treatment/Publication
|title=Syst. Nat.
|place=2: 343. 1821
|year=1821
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Draba alpina var. bellii
|authority=(Holm) O. E. Schulz
|rank=variety
}} {{Treatment/ID/Synonym
|name=Draba alpina var. corymbosa
|authority=Durand
|rank=variety
}} {{Treatment/ID/Synonym
|name=Draba barbata
|authority=Holm
|rank=species
}} {{Treatment/ID/Synonym
|name=Draba bellii
|authority=Lid ex E. Ekman
|rank=species
}} {{Treatment/ID/Synonym
|name=Draba kjellmanii
|authority=Adams
|rank=species
}} {{Treatment/ID/Synonym
|name=Draba macrocarpa
|authority=Davidson
|rank=species
}} {{Treatment/ID/Synonym
|name=Draba vestita
|authority=
|rank=species
}}
|hierarchy=Brassicaceae;Brassicaceae tribe Arabideae;Draba;Draba corymbosa
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Brassicaceae]]</div><div class="higher-taxon"><small>tribe</small>[[Brassicaceae tribe Arabideae]]</div><div class="higher-taxon"><small>genus</small>[[Draba]]</div><div class="higher-taxon"><small>species</small>[[Draba corymbosa]]</div></div>
|volume=Volume 7
|mention_page=page 270, 287, 290, 302
|treatment_page=page 301
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="">Perennials;</span> <span class="statement" id="st-d0_s1" data-properties="whole-organism duration">(cespitose);</span> <span class="statement" id="st-d0_s2" data-properties="">caudex branched (with persistent leaves or leaf remains, branches sometimes terminating in sterile rosettes);</span> <span class="statement" id="st-d0_s3" data-properties="caudex architecture;caudex architecture">scapose.</span> <span class="statement" id="st-d0_s4" data-properties="stem architecture;stem atypical some measurement;stem atypical some measurement;stem some measurement;stem pubescence;trichome architecture;trichome some measurement;trichome some measurement"><b>Stems </b>unbranched, (0.05–) 0.2–0.8 (–1.5) dm, pubescent throughout, trichomes simple and 2-rayed, 0.4–1 mm, with 3–5-rayed ones, 0.05–0.4 mm, (sometimes trichomes mostly simple).</span> <span class="statement" id="st-d0_s5" data-properties=""><b>Basal </b>leaves rosulate;</span> <span class="statement" id="st-d0_s6" data-properties="basal leaf arrangement;basal leaf architecture">petiolate;</span> <span class="statement" id="st-d0_s7" data-properties="petiole base architecture or pubescence or shape;petiole margin architecture or pubescence or shape">petiole base and margin ciliate, (trichomes often course, simple, 0.4–1.3 mm);</span> <span class="statement" id="st-d0_s8" data-properties="blade shape;blade length;blade width;margin architecture or shape;surface pubescence;surface some measurement;surface some measurement;surface some measurement;trichome architecture;trichome architecture;trichome architecture">blade oblanceolate to obovate, 0.6–1.8 cm × 1.5–5 mm, margins entire, surfaces pubescent, abaxially with stalked, 2–6-rayed trichomes, 0.2–0.6 mm, adaxially with primarily simple and stalked, 2-rayed trichomes, to 1.1 mm, with 3–5-rayed ones, 0.2–0.4 mm.</span> <span class="statement" id="st-d0_s9" data-properties="cauline leaf presence"><b>Cauline </b>leaves 0.</span> <span class="statement" id="st-d0_s10" data-properties="raceme architecture;raceme architecture;raceme length"><b>Racemes </b>2–9 (–12) -flowered, ebracteate, (corymbose), slightly elongated in fruit;</span> <span class="statement" id="st-d0_s11" data-properties="">rachis not flexuous, pubescent as stem.</span> <span class="statement" id="st-d0_s12" data-properties="rachis course;rachis pubescence;whole-organism orientation;whole-organism course;whole-organism course;whole-organism atypical some measurement;whole-organism some measurement;whole-organism pubescence;trichome architecture"><b>Fruiting </b>pedicels divaricate-ascending, straight or slightly curved upward, 4–11 (–16) mm, pubescent, trichomes simple and 2–4-rayed.</span> <span class="statement" id="st-d0_s13" data-properties="flower shape;flower some measurement;flower pubescence"><b>Flowers:</b> sepals (grayish green), broadly ovate, 2.2–3 mm, pubescent, (trichomes simple, to 1 mm, sometimes with stalked, smaller, 2–4-rayed ones);</span> <span class="statement" id="st-d0_s14" data-properties="flower coloration;flower shape;flower length;flower width">petals (broadly patent), yellow, obovate, 4–6 × 3–5 mm;</span> <span class="statement" id="st-d0_s15" data-properties="anther shape;anther some measurement">anthers ovate, 0.3–0.4 mm.</span> <span class="statement" id="st-d0_s16" data-properties="fruit shape;fruit shape;fruit shape;fruit shape;fruit length;fruit width"><b>Fruits </b>oblong or ovate, plane, flattened, 6–12 × 3.5–5.5 mm;</span> <span class="statement" id="st-d0_s17" data-properties="valve pubescence;valve pubescence;trichome architecture;trichome some measurement">valves pubescent or puberulent, trichomes simple, 0.1–0.4 mm, (sometimes with short-stalked, 2-rayed or 3-rayed ones);</span> <span class="statement" id="st-d0_s18" data-properties="ovule quantity">ovules 12–24 per ovary;</span> <span class="statement" id="st-d0_s19" data-properties="style some measurement">style 0.6–1 mm (stigma distinctly wider than style).</span> <span class="statement" id="st-d0_s20" data-properties="seed shape;seed length;seed width;2n chromosome quantity;2n chromosome quantity"><b>Seeds </b>(brown), ovoid, 1–1.3 × 0.6–0.9 mm. <b>2n</b> = 128, 144.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Aug.
|habitat=Moist tundra, among calcareous or dolomitic rocks, gravel beaches, silt and clay terraces
|elevation=0-1700 m
|distribution=Greenland;B.C.;N.W.T.;Nunavut;Yukon;Alaska;Europe (Norway);Europe (n Russia);e Asia (Russian Far East);e Asia (Siberia)
|discussion=<p>Draba corymbosa, which is 16-ploid or 18-ploid with x = 8, is an extremely variable species of polyphyletic, allopolyploid origin. Most individuals appear to have decaploid D. alpina (2n = 80) in their parentage, but the other genomes are provided by hexaploid (2n = 48) and octoploid (2n = 64) species (C. Brochmann et al. 1993). O. E. Schulz reduced D. corymbosa to a variety of D. alpina; R. C. Rollins (1993) treated it as a distinct species. Draba corymbosa is distinguished from D. alpina by having pubescent or puberulent (versus glabrous or glabrescent) fruits, corymbose (versus usually elongated) fruiting racemes, and abaxial leaf blade surfaces always lacking (versus usually with some) simple trichomes.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Draba corymbosa
|authority=R. Brown ex de Candolle
|rank=species
|parent rank=genus
|synonyms=Draba alpina var. bellii;Draba alpina var. corymbosa;Draba barbata;Draba bellii;Draba kjellmanii;Draba macrocarpa;Draba vestita
|basionyms=
|family=Brassicaceae
|phenology=Flowering Jun–Aug.
|habitat=Moist tundra, among calcareous or dolomitic rocks, gravel beaches, silt and clay terraces
|elevation=0-1700 m
|distribution=Greenland;B.C.;N.W.T.;Nunavut;Yukon;Alaska;Europe (Norway);Europe (n Russia);e Asia (Russian Far East);e Asia (Siberia)
|reference=None
|publication title=Syst. Nat.
|publication year=1821
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V7/V7_390.xml
|tribe=Brassicaceae tribe Arabideae
|genus=Draba
|species=Draba corymbosa
|2n chromosome quantity=144;128
|anther shape=ovate
|anther some measurement=0.3mm;0.4mm
|basal leaf architecture=petiolate
|basal leaf arrangement=rosulate
|blade length=0.6cm;1.8cm
|blade shape=oblanceolate;obovate
|blade width=1.5mm;5mm
|caudex architecture=scapose;branched
|cauline leaf presence=absent
|flower coloration=yellow
|flower length=4mm;6mm
|flower pubescence=pubescent
|flower shape=obovate;ovate
|flower some measurement=2.2mm;3mm
|flower width=3mm;5mm
|fruit length=6mm;12mm
|fruit shape=flattened;plane;ovate;oblong
|fruit width=3.5mm;5.5mm
|margin architecture or shape=entire
|ovule quantity=12;24
|petiole base architecture or pubescence or shape=ciliate
|petiole margin architecture or pubescence or shape=ciliate
|raceme architecture=ebracteate;2-9(-12)-flowered
|raceme length=elongated
|rachis course=not flexuous
|rachis pubescence=pubescent
|seed length=1mm;1.3mm
|seed shape=ovoid
|seed width=0.6mm;0.9mm
|stem architecture=unbranched
|stem atypical some measurement=0.8dm;1.5dm
|stem pubescence=pubescent
|stem some measurement=0.2dm;0.8dm
|style some measurement=0.6mm;1mm
|surface pubescence=pubescent
|surface some measurement=0.2mm;0.4mm
|trichome architecture=simple;simple;stalked;simple;stalked;simple
|trichome some measurement=0.1mm;0.4mm
|valve pubescence=puberulent;pubescent
|whole-organism atypical some measurement=11mm;16mm
|whole-organism course=curved;straight
|whole-organism duration=perennial
|whole-organism orientation=divaricate-ascending
|whole-organism pubescence=pubescent
|whole-organism some measurement=4mm;11mm
}}<!--

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