View source for Draba oligosperma

{{Treatment/ID
|accepted_name=Draba oligosperma
|accepted_authority=Hooker
|publications={{Treatment/Publication
|title=Fl. Bor.-Amer.
|place=1: 51. 1830
|year=1830
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Draba calcifuga
|authority=Lesica
}} {{Treatment/ID/Synonym
|name=Draba oligosperma var. andina
|authority=Nuttall
}} {{Treatment/ID/Synonym
|name=Draba oligosperma var. leiocarpa
|authority=O. E. Schulz
}} {{Treatment/ID/Synonym
|name=Draba oligosperma var. microcarpa
|authority=Blankinship
}} {{Treatment/ID/Synonym
|name=Draba oligosperma var. saximontana
|authority=(A. Nelson) O. E. Schulz
}} {{Treatment/ID/Synonym
|name=Draba oligosperma subsp. subsessilis
|authority=(S. Watson) A. E. Murray
}} {{Treatment/ID/Synonym
|name=Draba oligosperma var. subsessilis
|authority=(S. Watson) O. E. Schulz
}} {{Treatment/ID/Synonym
|name=Draba saximontana
|authority=unknown
}} {{Treatment/ID/Synonym
|name=Draba subsessilis
|authority=unknown
}}
|hierarchy=Brassicaceae;Brassicaceae tribe Arabideae;Draba;Draba oligosperma
|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 oligosperma]]</div></div>
|volume=Volume 7
|mention_page=page 280, 283, 286, 313, 325, 328, 344
|treatment_page=page 324
}}<!--

--><span class="statement" id="st-undefined" data-properties="">Perennials; (cespitose, densely pulvinate); caudex branched (with persistent leaf bases, branches congested or somewhat creeping, sometimes terminating in sterile rosettes); scapose. <b>Stems</b> unbranched, (0.1–)0.2–0.6(–1) dm, glabrous throughout or pubescent, trichomes sessile, pectinate, 0.1–0.3 mm, (their length parallel to long axis of stem). <b>Basal</b> leaves rosulate; sessile; blade linear to linear-oblanceolate, (0.2–)0.4–1.1(–1.5) cm × 0.4–1.5(–1.8) mm, margins entire, (not or, rarely, ciliate, trichomes simple, 0.2–0.4 mm), surfaces pubescent with sessile, pectinate trichomes, 0.1–0.4 mm, (their long axis parallel to prominent abaxial midvein), sometimes glabrous adaxially. <b>Cauline</b> leaves 0. <b>Racemes</b> 4–12(–17)-flowered, ebracteate, elongated in fruit; rachis not flexuous, glabrous or pubescent as stem. <b>Fruiting</b> pedicels divaricate-ascending, straight, (2–)3–10(–13) mm, glabrous or sparsely pubescent, trichomes pectinate. <b>Flowers</b>: sepals ovate, 1.5–3 mm, glabrous or sparsely pubescent, (trichomes pectinate, 2-rayed, or simple); petals usually yellow, rarely creamy white, obovate, 2.5–4 × 1.5–3 mm; anthers ovate, 0.4–0.5 mm, (not producing pollen). <b>Fruits</b> ovoid to lanceolate, plane, inflated at least basally, sometimes slightly flattened distally, 3–6(–7) × 2–3.5(–4) mm; valves usually puberulent, rarely glabrous, trichomes simple and sessile, often unequally 2-rayed, 0.07–0.35 mm; ovules 6–12 per ovary; style 0.1–0.8(–1.1) mm. <b>Seeds</b> ovoid, 1.1–1.5 × 0.7–1 mm. <b>2n</b> = 32, 64.</span><!--

-->{{Treatment/Body
|phenology=Flowering May–Jul.
|habitat=Rock outcrops, talus, gravel benches, tundra
|elevation=200-3900 m
|distribution=Alta.;B.C.;N.W.T.;Nunavut;Yukon;Alaska;Calif.;Colo.;Idaho;Mont.;Nev.;Oreg.;Wyo.
|discussion=<p><i>Draba oligosperma</i> is a highly variable and widespread species that has been shown to be apomictic (G. A. Mulligan and J. N. Findlay 1970; Mulligan 1972). It has been divided into species and infraspecific taxa by previous authors; the variation is continuous in every character; there are no clear geographical and morphological patterns that support its division. For characteristics separating <i>D. oligosperma</i> from the closely related <i>D. pectinipila</i>, see 80. <i>D. pectinipila</i>.</p><!--
--><p><i>Draba</i> andina (Nuttall) A. Nelson (1899), not Philippi (1858) is an illegitimate name, sometimes found in synonymy under <i>D. oligosperma</i>.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Draba oligosperma
|author=
|authority=Hooker
|rank=species
|parent rank=genus
|synonyms=Draba calcifuga;Draba oligosperma var. andina;Draba oligosperma var. leiocarpa;Draba oligosperma var. microcarpa;Draba oligosperma var. saximontana;Draba oligosperma subsp. subsessilis;Draba oligosperma var. subsessilis;Draba saximontana;Draba subsessilis
|basionyms=
|family=Brassicaceae
|phenology=Flowering May–Jul.
|habitat=Rock outcrops, talus, gravel benches, tundra
|elevation=200-3900 m
|distribution=Alta.;B.C.;N.W.T.;Nunavut;Yukon;Alaska;Calif.;Colo.;Idaho;Mont.;Nev.;Oreg.;Wyo.
|reference=None
|publication title=Fl. Bor.-Amer.
|publication year=1830
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V7/V7_439.xml
|tribe=Brassicaceae tribe Arabideae
|genus=Draba
|species=Draba oligosperma
}}<!--

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