View source for Draba ruaxes

{{Treatment/ID
|accepted_name=Draba ruaxes
|accepted_authority=Payson & H. St. John
|publications={{Treatment/Publication
|title=Proc. Biol. Soc. Wash.
|place=43: 117. 1930
|year=1930
}}
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Draba ventosa var. ruaxes
|authority=(Payson & H. St. John) C. L. Hitchcock
|rank=variety
}}
|hierarchy=Brassicaceae;Brassicaceae tribe Arabideae;Draba;Draba ruaxes
|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 ruaxes]]</div></div>
|volume=Volume 7
|mention_page=page 281, 286, 287, 344
|treatment_page=page 334
}}<!--

--><span class="statement" id="st-undefined" data-properties="">Perennials; (cespitose, forming tufts); caudex branched (with persistent leaf bases, branches some terminating in sterile rosettes); scapose. <b>Stems</b> unbranched, 0.2–0.6(–0.8) dm, often pubescent throughout, sometimes glabrate distally, trichomes simple, 0.4–1 mm, and 2–4-rayed, 0.1–0.4 mm. <b>Basal</b> leaves rosulate; subsessile; petiole base and margin ciliate, (trichomes simple, 0.4–1.4 mm); blade oblanceolate to obovate or suborbicular, 0.3–1 cm × 2–4.5 mm, margins entire, surfaces pubescent, abaxially with stalked, 2–10-rayed, stellate trichomes, 0.2–0.8 mm, adaxially with simple trichomes, 0.4–1 mm, sometimes with smaller, 2–4-rayed ones, (midvein obscure). <b>Cauline</b> leaves 0. <b>Racemes</b> (2–)4–10(–14)-flowered, ebracteate, elongated in fruit; rachis not flexuous, pubescent as stem or glabrous. <b>Fruiting</b> pedicels ascending to divaricate-ascending, straight or slightly curved upward, 3–7(–9) mm, pubescent or glabrous, trichomes simple and 2–4-rayed. <b>Flowers</b>: sepals ovate, 2–3 mm, pubescent, (trichomes simple with fewer, 2-rayed ones); petals bright yellow, obovate, 4–6 × 2–3.5 mm; anthers oblong, 0.4–0.5 mm. <b>Fruits</b> elliptic to lanceolate or ovate to suborbicular, plane, flattened, 4–8(–10) × 3–4.5 mm; valves puberulent, trichomes simple with fewer 2-rayed ones, 0.1–0.35 mm; ovules 12–16 per ovary; style 0.5–0.9(–1.1) mm. <b>Seeds</b> oblong, 1.5–2 × 1–1.3 mm. <b>2n</b> = 72.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Jul.
|habitat=Rock outcrops, talus slopes, ridges, alpine summits
|elevation=500-2400 m
|distribution=Alta.;B.C.;Yukon;Alaska;Wash.
|discussion=<p>C. L. Hitchcock (1941) treated <i>Draba ruaxes</i> as a variety of <i>D. ventosa</i>; as demonstrated by G. A. Mulligan (1971b), the two are quite distinct. <i>Draba ruaxes</i> is an outcrossing hexaploid with well-formed anthers and pollen, and abundant, simple trichomes on leaves, stems, sepals, and fruits. By contrast, <i>D. ventosa</i> is an apomictic triploid with abortive anthers and/or pollen, and no simple trichomes anywhere on the plant.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Draba ruaxes
|authority=Payson & H. St. John
|rank=species
|parent rank=genus
|synonyms=Draba ventosa var. ruaxes
|basionyms=
|family=Brassicaceae
|phenology=Flowering Jun–Jul.
|habitat=Rock outcrops, talus slopes, ridges, alpine summits
|elevation=500-2400 m
|distribution=Alta.;B.C.;Yukon;Alaska;Wash.
|reference=None
|publication title=Proc. Biol. Soc. Wash.
|publication year=1930
|special status=Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V7/V7_459.xml
|tribe=Brassicaceae tribe Arabideae
|genus=Draba
|species=Draba ruaxes
}}<!--

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