View source for Smelowskia americana

{{Treatment/ID
|accepted_name=Smelowskia americana
|accepted_authority=Rydberg
|publications={{Treatment/Publication
|title=Bull. Torrey Bot. Club
|place=29: 239. 1902
|year=1902
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Hutchinsia calycina var. americana
|authority=Regel & Herder
}} {{Treatment/ID/Synonym
|name=Smelowskia calycina var. americana
|authority=(Regel & Herder) W. H. Drury & Rollins
}} {{Treatment/ID/Synonym
|name=Smelowskia lineariloba
|authority=Rydberg
}} {{Treatment/ID/Synonym
|name=Smelowskia lobata
|authority=Rydberg
}}
|hierarchy=Brassicaceae;Brassicaceae tribe Smelowskieae;Smelowskia;Smelowskia americana
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Brassicaceae]]</div><div class="higher-taxon"><small>tribe</small>[[Brassicaceae tribe Smelowskieae]]</div><div class="higher-taxon"><small>genus</small>[[Smelowskia]]</div><div class="higher-taxon"><small>species</small>[[Smelowskia americana]]</div></div>
|volume=Volume 7
|mention_page=page 673, 674
|treatment_page=page 672
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>sometimes canescent basally; caudex branched. <b>Stems</b>: several from base, often unbranched, (0.4–)0.6–2(–2.7) dm, trichomes simple, 0.5–1.3 mm, mixed with smaller, dendritic ones. <b>Basal</b> leaves: petiole 1–5(–8) cm, ciliate, trichomes simple; blade oblanceolate to obovate, or ovate to oblong in outline, (terminal segments linear, oblong, or ovate), (0.5–)1–3.5(–5.2) cm × 4–17 mm, (terminal segments 0.2–1.4 cm × 0.5–4 mm), margins 1- or 2-pinnatifid or -pinnatisect, apex obtuse or subacute. <b>Cauline</b> leaves shortly petiolate or sessile; blade similar to basal, smaller distally. <b>Racemes</b> elongated in fruit. <b>Fruiting</b> pedicels suberect to ascending, (subappressed to rachis, often forming less than 40˚ angle), proximalmost bracteate, 4–10(–14) mm, pubescent, trichomes simple (to 1.5 mm), mixed with smaller, dendritic ones. <b>Flowers</b>: sepals 2–3.5 mm; petals usually white, rarely pinkish or lavender, suborbicular to obovate, 3.5–6.5 × 1.5–3.5mm, narrowed to claw, 1.5–3 mm, apex rounded; anthers oblong, 0.5–0.7 mm. <b>Fruits</b> usually suberect, rarely ascending, ellipsoid or oblong to linear, 4-angled, 5–13 × 1.5–2 mm, base and apex cuneate; valves each with prominent midvein; ovules 8–12(–14) per ovary; style 0.2–0.8 mm. <b>Seeds</b> 1.1–1.9 × 0.6–0.9 mm. <b>2n</b> = 12, 22.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Aug.
|habitat=Talus and scree slopes, rock crevices, tundra, alpine meadows, fellfields
|elevation=2900-4000 m
|distribution=Alta.;B.C.;Colo.;Idaho;Mont.;Nev.;Oreg.;Utah;Wash.;Wyo.
|discussion=<p>Both R. C. Rollins (1993) and N. H. Holmgren (2005b) listed 2n = 44 for <i>Smelowskia americana</i> (as S. calycina <i></i>var.<i> americana</i>), but no such number is known for any species of the genus (S. I. Warwick and I. A. Al-Shehbaz 2006). It is most likely that the first two authors erred in reporting 2n = 22 for the species. The latter count is likely to represent a dysploid reduction of tetraploid populations based on x = 6.</p><!--
--><p>Previous North American authors (e.g., W. H. Drury Jr. and R. C. Rollins 1952; Rollins 1993; N. H. Holmgren 2005b) believed that the central Asian <i>Smelowskia</i> calycina and the North American plants also attributed to it are conspecific. S. I. Warwick et al. (2004b) clearly demonstrated that they are different species. The North American plants, <i>S. americana</i>, are easily distinguished from S. calycina by having readily caducous instead of persistent calyces. As recognized by Rollins (1993), the North American S. calycina represented three distinct taxa (<i>S. americana</i>, <i>S. media</i>, <i>S. porsildii</i>) none of which belongs to that species.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Smelowskia americana
|author=
|authority=Rydberg
|rank=species
|parent rank=genus
|synonyms=Hutchinsia calycina var. americana;Smelowskia calycina var. americana;Smelowskia lineariloba;Smelowskia lobata
|basionyms=
|family=Brassicaceae
|phenology=Flowering Jun–Aug.
|habitat=Talus and scree slopes, rock crevices, tundra, alpine meadows, fellfields
|elevation=2900-4000 m
|distribution=Alta.;B.C.;Colo.;Idaho;Mont.;Nev.;Oreg.;Utah;Wash.;Wyo.
|reference=None
|publication title=Bull. Torrey Bot. Club
|publication year=1902
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V7/V7_1153.xml
|tribe=Brassicaceae tribe Smelowskieae
|genus=Smelowskia
|species=Smelowskia americana
}}<!--

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