View source for Draba arabisans

{{Treatment/ID
|accepted_name=Draba arabisans
|accepted_authority=Michaux
|publications={{Treatment/Publication
|title=Fl. Bor.-Amer.
|place=2: 28. 1803
|year=1803
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Draba arabisans var. superiorensis
|authority=Butters & Abbe
}} {{Treatment/ID/Synonym
|name=Draba incana var. arabisans
|authority=(Michaux) S. Watson
}} {{Treatment/ID/Synonym
|name=Draba incana var. glabriuscula
|authority=A. Gray
}}
|hierarchy=Brassicaceae;Brassicaceae tribe Arabideae;Draba;Draba arabisans
|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 arabisans]]</div></div>
|volume=Volume 7
|mention_page=page 275, 277, 308
|treatment_page=page 291
}}<!--

--><span class="statement" id="st-undefined" data-properties="">Perennials; (sometimes cespitose); caudex simple or branched; not scapose. <b>Stems</b> branched or unbranched, (0.5–)0.7–3(–4.5) dm, pubescent proximally, glabrous or pubescent distally, trichomes sessile (non-crisped), 4- or 5-rayed, stellate, or subpectinate, 0.07–0.4 mm. <b>Basal</b> leaves rosulate; petiolate; petiole base and margin sparsely ciliate, (trichomes simple and 2-rayed, 0.2–0.8 mm); blade oblanceolate to spatulate or linear-oblanceolate, 1–3.8(–5) cm × 2–5(–8) mm, margins dentate or denticulate, surfaces pubescent with sessile, non-crisped, 4- or 5-rayed, stellate trichomes, 0.07–0.5mm, (some rays branched, appearing 2–12-rayed, midvein obscure abaxially). <b>Cauline</b> leaves (2 or) 3–10(–13); sessile; blade ovate to oblong, margins dentate to subentire, surfaces pubescent as basal. <b>Racemes</b> 5–18(–25)-flowered, ebracteate, elongated in fruit; rachis not flexuous, glabrous or pubescent as stem. <b>Fruiting</b> pedicels divaricate-ascending to suberect, straight or slightly curved, (3–)4–10(–13) mm, glabrous or pubescent as stem. <b>Flowers</b>: sepals oblong, 1.7–2.5 mm, pubescent, trichomes short-stalked, 3- or 4-rayed; petals white, broadly obovate, 3.5–5 × 1.5–2.5 mm; anthers ovate, 0.4–0.5 mm. <b>Fruits</b> ovate to lanceolate or linear-lanceolate, usually slightly twisted, rarely plane, flattened, 5–11(–14) × 2–3.5 mm; valves usually glabrous, rarely pubescent, trichomes 3- or 4-rayed, 0.07–0.2 mm; ovules 20–28(–32) per ovary; style (0.2–)0.4–1 mm. <b>Seeds</b> oblong, 0.8–1.1 × 0.6–0.8 mm. <b>2n</b> = 96.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Aug.
|habitat=Rock outcrops and talus (usually limestone or dolomite), open woods, rocky shores
|elevation=0-300 m
|distribution=Man.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;Que.;Maine;Mich.;Minn.;N.Y.;Vt.;Wis.
|discussion=<p><i>Draba arabisans</i> is often confused with <i>D. glabella</i> (2n = 80); it is easily distinguished by having sessile (versus short-stalked) stellate trichomes on abaxial leaf blade surfaces and longer styles (0.2–)0.4–1 [versus 0.1–0.2(–0.4)] mm. Both species have twisted and plane fruits; <i>D. arabisans</i> has mostly twisted fruits; <i>D. glabella</i> has predominantly plane fruits. The complete absence of simple trichomes proximally on stems of <i>D. arabisans</i> can be a useful feature separating it from <i>D. glabella</i>, which often has at least some simple trichomes on the proximal half of the stem.</p><!--
--><p><i>Draba</i> arabis Persoon is an illegitimate name, sometimes found in synonymy with <i>D. arabisans</i>.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Draba arabisans
|author=
|authority=Michaux
|rank=species
|parent rank=genus
|synonyms=Draba arabisans var. superiorensis;Draba incana var. arabisans;Draba incana var. glabriuscula
|basionyms=
|family=Brassicaceae
|phenology=Flowering Jun–Aug.
|habitat=Rock outcrops and talus (usually limestone or dolomite), open woods, rocky shores
|elevation=0-300 m
|distribution=Man.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;Que.;Maine;Mich.;Minn.;N.Y.;Vt.;Wis.
|reference=None
|publication title=Fl. Bor.-Amer.
|publication year=1803
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V7/V7_367.xml
|tribe=Brassicaceae tribe Arabideae
|genus=Draba
|species=Draba arabisans
}}<!--

-->[[Category:Treatment]][[Category:Draba]]