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-undefined" data-properties="">Perennials; (cespitose); caudex branched (with persistent leaves or leaf remains, branches sometimes terminating in sterile rosettes); scapose. <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). <b>Basal</b> leaves rosulate; petiolate; petiole base and margin ciliate, (trichomes often course, simple, 0.4–1.3 mm); 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. <b>Cauline</b> leaves 0. <b>Racemes</b> 2–9(–12)-flowered, ebracteate, (corymbose), slightly elongated in fruit; rachis not flexuous, pubescent as stem. <b>Fruiting</b> pedicels divaricate-ascending, straight or slightly curved upward, 4–11(–16) mm, pubescent, trichomes simple and 2–4-rayed. <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); petals (broadly patent), yellow, obovate, 4–6 × 3–5 mm; anthers ovate, 0.3–0.4 mm. <b>Fruits</b> oblong or ovate, plane, flattened, 6–12 × 3.5–5.5 mm; valves pubescent or puberulent, trichomes simple, 0.1–0.4 mm, (sometimes with short-stalked, 2- or 3-rayed ones); ovules 12–24 per ovary; style 0.6–1 mm (stigma distinctly wider than style). <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;n Russia);e Asia (Russian Far East;Siberia).
|discussion=<p><i>Draba corymbosa</i>, 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 <i>D. alpina</i> (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 <i>D. corymbosa</i> to a variety of <i>D. alpina</i>; R. C. Rollins (1993) treated it as a distinct species. <i>Draba corymbosa</i> is distinguished from <i>D. alpina</i> 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;n Russia);e Asia (Russian Far East;Siberia).
|reference=None
|publication title=Syst. Nat.
|publication year=1821
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V7/V7_390.xml
|tribe=Brassicaceae tribe Arabideae
|genus=Draba
|species=Draba corymbosa
}}<!--

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