View source for Sieversia ← Sieversia You do not have permission to edit this page, for the following reason: The action you have requested is limited to users in the group: Users. You can view and copy the source of this page. {{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-d0_s0" data-properties=""><b>Subshrubs </b>(dwarf), subscapose, 0.2–0.8 [–1.5] dm;</span> <span class="statement" id="st-d0_s1" data-properties="whole_organism architecture;whole_organism atypical some measurement;whole_organism some measurement;whole_organism architecture;whole_organism growth form">rhizomatous, rhizomes branching, slender, woody;</span> <span class="statement" id="st-d0_s2" data-properties="rhizome architecture;rhizome size;rhizome texture;rhizome architecture">fibrous-rooted.</span> <span class="statement" id="st-d0_s3" data-properties="stem quantity;stem orientation;stem architecture;stem pubescence"><b>Stems </b>1–5+, decumbent to ascending, simple, glabrous.</span> <span class="statement" id="st-d0_s4" data-properties="leaf duration;cauline leaf architecture"><b>Leaves </b>deciduous, cauline (often crowded near stem apices), pinnately compound;</span> <span class="statement" id="st-d0_s5" data-properties="stipule fusion;stipule arrangement or course or shape;margin architecture or shape">stipules adnate to petiole base, linear, margins entire;</span> <span class="statement" id="st-d0_s6" data-properties="petiole presence">petiole present;</span> <span class="statement" id="st-d0_s7" data-properties="blade shape;blade some measurement;blade growth form or texture;leaflet quantity;leaflet shape;margin shape;margin shape;margin shape;margin shape;margin architecture or shape;surface pubescence">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.</span> <span class="statement" id="st-d0_s8" data-properties="inflorescence position or structure subtype;flower architecture or arrangement or growth form"><b>Inflorescences </b>terminal, flowers solitary;</span> <span class="statement" id="st-d0_s9" data-properties="bract quantity;bract quantity">bracts 1 or 2.</span> <span class="statement" id="st-d0_s10" data-properties="pedicel presence"><b>Pedicels </b>present.</span> <span class="statement" id="st-d0_s11" data-properties="flower diameter"><b>Flowers </b>15–25 mm diam.;</span> <span class="statement" id="st-d0_s12" data-properties="epicalyx bractlet quantity">epicalyx bractlets 5;</span> <span class="statement" id="st-d0_s13" data-properties="hypanthium shape;hypanthium some measurement;hypanthium pubescence">hypanthium saucer-shaped, 2 mm, puberulent;</span> <span class="statement" id="st-d0_s14" data-properties="sepal quantity;sepal orientation;sepal shape">sepals 5, spreading, ovate;</span> <span class="statement" id="st-d0_s15" data-properties="petal quantity;petal coloration;petal coloration;petal coloration;petal shape">petals 5, white, some yellow at base or fading yellowish, obovate to elliptic;</span> <span class="statement" id="st-d0_s16" data-properties="stamen quantity;stamen height or length or size">stamens 100–120, shorter than petals;</span> <span class="statement" id="st-d0_s17" data-properties="torus shape;torus pubescence">torus hemispheric, short-hairy;</span> <span class="statement" id="st-d0_s18" data-properties="carpel quantity;carpel pubescence;style architecture">carpels 30–70, hairy, styles not geniculate-jointed;</span> <span class="statement" id="st-d0_s19" data-properties="ovule quantity">ovule 1.</span> <span class="statement" id="st-d0_s20" data-properties="fruit shape;fruit shape;fruit some measurement;fruit pubescence;achene arrangement;achene quantity"><b>Fruits </b>aggregated achenes, 30–70, ovoid to fusiform, tapered apically, 2 mm, hairy;</span> <span class="statement" id="st-d0_s21" data-properties="hypanthium duration">hypanthium persistent;</span> <span class="statement" id="st-d0_s22" data-properties="sepal duration;sepal orientation">sepals persistent, spreading to reflexed;</span> <span class="statement" id="st-d0_s23" data-properties="style duration;style length;style shape;style pubescence;distal some measurement;x chromosome quantity">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>Sieversia 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 Sieversia 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 S. pentapetala, in Geum (see discussion under 4. Geum). The Asian endemic S. pusilla Hultén differs from S. pentapetala 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= }}<!-- --><!-- -->{{#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://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V9/V9_81.xml |subfamily=Rosaceae subfam. Rosoideae |tribe=Rosaceae tribe Colurieae |genus=Sieversia |achene arrangement=aggregated |achene quantity=30;70 |blade growth form or texture=herbaceous |blade shape=elliptic;obovate |blade some measurement=1cm;3.5cm |bract quantity=2;1 |carpel pubescence=hairy |carpel quantity=30;70 |cauline leaf architecture=compound |distal some measurement=1 |epicalyx bractlet quantity=5 |flower architecture or arrangement or growth form=solitary |flower diameter=15mm;25mm |fruit pubescence=hairy |fruit shape=tapered;ovoid;fusiform |fruit some measurement=2 |hypanthium duration=persistent |hypanthium pubescence=puberulent |hypanthium shape=saucer--shaped |hypanthium some measurement=2 |inflorescence position or structure subtype=terminal |leaf duration=deciduous |leaflet quantity=3;11 |leaflet shape=narrowly elliptic;obovate or rhombic |margin architecture or shape=pinnate;entire |margin shape=toothed;lobed;entire;flat |ovule quantity=1 |pedicel presence=absent |petal coloration=fading yellowish;yellow;white |petal quantity=5 |petal shape=obovate;elliptic |petiole presence=absent |rhizome architecture=fibrous-rooted;branching |rhizome size=slender |rhizome texture=woody |sepal duration=persistent |sepal orientation=spreading;reflexed |sepal quantity=5 |sepal shape=ovate |stamen height or length or size=shorter |stamen quantity=100;120 |stem architecture=simple |stem orientation=decumbent;ascending |stem pubescence=glabrous |stem quantity=1;5 |stipule arrangement or course or shape=linear |stipule fusion=adnate |style architecture=not geniculate-jointed |style duration=persistent |style length=elongating |style pubescence=pilose |style shape=not hooked |surface pubescence=glabrous |torus pubescence=short-hairy |torus shape=hemispheric |whole_organism architecture=rhizomatous;subscapose |whole_organism atypical some measurement=0.8dm;1.5dm |whole_organism growth form=subshrub |whole_organism some measurement=0.2dm;0.8dm |x chromosome quantity=7 }}<!-- -->[[Category:Treatment]][[Category:Rosaceae tribe Colurieae]] Templates used on this page: Template:Rosaceae (view source) Template:Treatment/AuthorLink (view source) Template:Treatment/Body (view source) Template:Treatment/Body/Maps (view source) Template:Treatment/ID (view source) Template:Treatment/Publication (view source) Return to Sieversia.