View source for Sieversia

{{Treatment/ID
|accepted_name=Sieversia
|accepted_authority=Willdenow
|publications={{Treatment/Publication
|title=Ges. Naturf. Freunde Berlin Mag. Neuesten Entdeck. Gesammten Naturk.
|place=5: 397. 1811
|year=1811
}}
|basionyms=
|synonyms=
|hierarchy=Rosaceae;Rosaceae subfam. Rosoideae;Rosaceae tribe Colurieae;Sieversia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Rosaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Rosaceae subfam. Rosoideae]]</div><div class="higher-taxon"><small>tribe</small>[[Rosaceae tribe Colurieae]]</div><div class="higher-taxon"><small>genus</small>[[Sieversia]]</div></div>
|etymology=For Johann August Carl Sievers, 1762–1795, German-born apothecary who explored eastern Russia in search of medicinal rhubarb
|volume=Volume 9
|mention_page=page 58, 59
|treatment_page=page 57
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Subshrubs </b>(dwarf), subscapose, 0.2–0.8[–1.5] dm; rhizomatous, rhizomes branching, slender, woody; fibrous-rooted. <b>Stems</b> 1–5+, decumbent to ascending, simple, glabrous. <b>Leaves</b> deciduous, cauline (often crowded near stem apices), pinnately compound; stipules adnate to petiole base, linear, margins entire; petiole present; blade elliptic to obovate, 1–3.5 cm, herbaceous, leaflets 3–11, narrowly elliptic to obovate or rhombic, margins flat, entire or sharply lobed or toothed apically, venation pinnate, surfaces glabrous. <b>Inflorescences</b> terminal, flowers solitary; bracts 1 or 2. <b>Pedicels</b> present. <b>Flowers</b> 15–25 mm diam.; epicalyx bractlets 5; hypanthium saucer-shaped, 2 mm, puberulent; sepals 5, spreading, ovate; petals 5, white, some yellow at base or fading yellowish, obovate to elliptic; stamens 100–120, shorter than petals; torus hemispheric, short-hairy; carpels 30–70, hairy, styles not geniculate-jointed; ovule 1. <b>Fruits</b> aggregated achenes, 30–70, ovoid to fusiform, tapered apically, 2 mm, hairy; hypanthium persistent; sepals persistent, spreading to reflexed; styles persistent, elongating to 20[–27] mm, not hooked, pilose except distal 1 mm. <b>x</b> = 7.</span><!--

-->{{Treatment/Body
|distribution=Alaska;e Asia.
|discussion=<p>Species 1 or 2 (1 in the flora).</p><!--
--><p><i>Sieversia</i> is circumscribed here in its original narrow sense and follows the treatment by J. E. E. Smedmark (2006). Late nineteenth- and early twentieth-century authors often included within <i>Sieversia</i> all members of Colurieae with fruits bearing relatively long, slender, plumose styles that lack a geniculate joint. Smedmark and her colleagues have shown that this fruit type is probably ancestral in Colurieae and have argued for placement of all North American species, except for <i>S. pentapetala</i>, in <i>Geum</i> (see discussion under 4. <i>Geum</i>). The Asian endemic <i>S. pusilla</i> Hultén differs from <i>S. pentapetala</i> largely in its greater degree of blade division (the leaflets are deeply divided resulting in nearly bipinnate blades) and may or may not be a distinct species.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Sieversia
|author=Joseph R. Rohrer
|authority=Willdenow
|rank=genus
|parent rank=tribe
|synonyms=
|basionyms=
|family=Rosaceae
|distribution=Alaska;e Asia.
|reference=None
|publication title=Ges. Naturf. Freunde Berlin Mag. Neuesten Entdeck. Gesammten Naturk.
|publication year=1811
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V9/V9_81.xml
|subfamily=Rosaceae subfam. Rosoideae
|tribe=Rosaceae tribe Colurieae
|genus=Sieversia
}}<!--

-->[[Category:Treatment]][[Category:Rosaceae tribe Colurieae]]