View source for Draba porsildii

{{Treatment/ID
|accepted_name=Draba porsildii
|accepted_authority=G. A. Mulligan
|publications={{Treatment/Publication
|title=Canad. J. Bot.
|place=52: 1795, fig. 8. 1974
|year=1974
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Draba nivalis var. brevicula
|authority=Rollins
}} {{Treatment/ID/Synonym
|name=Draba porsildii var. brevicula
|authority=(Rollins) Rollins
}}
|hierarchy=Brassicaceae;Brassicaceae tribe Arabideae;Draba;Draba porsildii
|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 porsildii]]</div></div>
|volume=Volume 7
|mention_page=page 275, 281
|treatment_page=page 331
}}<!--

--><span class="statement" id="st-undefined" data-properties="">Perennials; (cespitose); caudex branched (with persistent leaf remains); often scapose. <b>Stems</b> unbranched, 0.2–1.2 dm, sparsely pubescent proximally, trichomes short-stalked, 3–5- rayed, (non-crisped), 0.2–0.4 mm, glabrous distally. <b>Basal</b> leaves rosulate; subsessile or shortly petiolate; petiole base and margin ciliate proximally, (trichomes simple, subsetiform, stiff, 0.3–0.9 mm); blade oblanceolate to obovate, 0.4–1.5 cm × 1–3 mm, margins entire, surfaces pubescent, abaxially with stalked, 6–12-rayed, (non-crisped) trichomes, 0.2–0.5 mm, (midvein obscure), adaxially similar, or with simple trichomes on proximal 1/2. <b>Cauline</b> leaves 0 or 1; sessile; blade oblong to lanceolate, margins entire, surfaces pubescent as basal. <b>Racemes</b> 3–13-flowered, ebracteate, elongated in fruit; rachis not flexuous, glabrous. <b>Fruiting</b> pedicels divaricate-ascending, straight, 1–4(–8) mm, glabrous. <b>Flowers</b>: sepals ovate, 1.5–2 mm, pubescent, (trichomes simple and 2-rayed); petals white, spatulate, 2–4 × 1–1.7 mm; anthers ovate, ca. 0.2 mm. <b>Fruits</b> ovate to oblong, plane, flattened, 4–7.5 × 1.7–3 mm; valves glabrous; ovules 12–16 per ovary; style 0.1–0.3(–0.5) mm. <b>Seeds</b> ovoid, 0.7–1 × 0.5–0.6 mm. <b>2n</b> = 32.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Jul.
|habitat=Rock outcrops, talus, meadows, gravel slopes
|elevation=600-3000 m
|distribution=Alta.;Yukon;Alaska;Mont.;Wyo.
|discussion=<p>According to H. H. Grundt et al. (2004), tetraploid <i>Draba porsildii</i> probably originated from a diploid ancestor such as <i>D. lonchocarpa</i>. The Wyoming plants are a close match to the type of the species, though they have distinctly shorter pedicels. Some of the Alaskan plants are more problematic; they have finer and more branched trichomes, larger flowers, longer pedicels, and longer styles than the type. It is likely that they belong to another species; detailed molecular and cytological studies on this complex are needed before any meaningful conclusions are reached.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Draba porsildii
|author=
|authority=G. A. Mulligan
|rank=species
|parent rank=genus
|synonyms=Draba nivalis var. brevicula;Draba porsildii var. brevicula
|basionyms=
|family=Brassicaceae
|phenology=Flowering Jun–Jul.
|habitat=Rock outcrops, talus, meadows, gravel slopes
|elevation=600-3000 m
|distribution=Alta.;Yukon;Alaska;Mont.;Wyo.
|reference=None
|publication title=Canad. J. Bot.
|publication year=1974
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V7/V7_452.xml
|tribe=Brassicaceae tribe Arabideae
|genus=Draba
|species=Draba porsildii
}}<!--

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