View source for Spiraea stevenii

{{Treatment/ID
|accepted_name=Spiraea stevenii
|accepted_authority=(C. K. Schneider) Rydberg in N. L. Britton et al.
|publications={{Treatment/Publication
|title=in N. L. Britton et al., N. Amer. Fl.
|place=22: 247. 1908
|year=1908
}}
|common_names=Alaska or Beauverd's spiraea
|basionyms={{Treatment/ID/Basionym
|name=Spiraea beauverdiana var. stevenii
|authority=C. K. Schneider
|rank=variety
|publication_title=Bull. Herb. Boissier, sér.
|publication_place=2, 5: 348. 1905 (as steveni)
}}
|synonyms={{Treatment/ID/Synonym
|name=S. chamaedryfolia var. media
|authority=Pursh
|rank=variety
}}
|hierarchy=Rosaceae;Rosaceae subfam. Amygdaloideae;Rosaceae tribe Spiraeeae;Spiraea;Spiraea stevenii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Rosaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Rosaceae subfam. Amygdaloideae]]</div><div class="higher-taxon"><small>tribe</small>[[Rosaceae tribe Spiraeeae]]</div><div class="higher-taxon"><small>genus</small>[[Spiraea]]</div><div class="higher-taxon"><small>species</small>[[Spiraea stevenii]]</div></div>
|volume=Volume 9
|mention_page=page 400
|treatment_page=page 405
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> 1–10 dm. <b>Stems</b> ascending to prostrate, rarely dying to ground, rarely branched. <b>Leaves</b>: petiole 0.5–6 mm; blade ovate to elliptic, 1–6 × 0.5–2.5 cm, membranous, base obtuse, margins regularly to irregularly serrulate on distal 1/4–1/2 to crenate or entire (long shoot leaves sometimes serrate on full blade), teeth rounded, number of primary and secondary serrations 0–1 times number of secondary veins (excluding inter-secondary veins), venation pinnate cladodromous, secondary veins not prominent, apex obtuse, surfaces glabrous. <b>Inflorescences</b> mostly terminal, corymbiform (dense), 1–3[–5] × 0.5–3[–5] cm height usually 1 times diam.; branches rarely in axils of leaves, usually glabrous or puberulent, sometimes villous. <b>Pedicels</b> 1–5(–8) mm, usually glabrous or puberulent, sometimes villous. <b>Flowers</b> 4–6 mm diam.; hypanthia hemispheric, 0.7–1 mm, abaxial surface puberulent to pubescent, adaxial glabrate to pubescent; sepals triangular, 1–1.5 mm; petals white, orbiculate, 1.5–2.5 mm; staminodes 10–12; stamens 18–22, 2 times petal length. <b>Follicles</b> oblanceoloid, 2.5–3.5 mm, puberulent.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Sep; fruiting Jul–Nov.
|habitat=Meadows, tundra, open woods, thickets, stream banks, lake edges, alpine areas
|elevation=0–2000 m
|distribution=B.C.;N.W.T.;Yukon;Alaska;e Asia.
|discussion=<p><i>Spiraea stevenii</i> has been frequently referred to as S. beauverdiana; the nomenclatural history of this was well summarized by L. J. Uttal (1973), who noted that the type for S. beauverdiana is a specimen that belongs in the circumscription of S. aemeliana. A study of the pollen morphology of S. betulifolia and <i>S. stevenii</i> (S. beauverdiana) (T. A. Poljakova and G. N. Gataulina 2008) showed substantial differences between these two taxa. Examination of the carpel anatomy of various species of <i>Spiraea</i> (C. Sterling 1966) showed that <i>S. stevenii</i> differs from other species except <i>S. lucida</i>.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Spiraea stevenii
|authority=(C. K. Schneider) Rydberg in N. L. Britton et al.
|rank=species
|parent rank=genus
|synonyms=S. chamaedryfolia var. media
|basionyms=Spiraea beauverdiana var. stevenii
|family=Rosaceae
|phenology=Flowering Jun–Sep; fruiting Jul–Nov.
|habitat=Meadows, tundra, open woods, thickets, stream banks, lake edges, alpine areas
|elevation=0–2000 m
|distribution=B.C.;N.W.T.;Yukon;Alaska;e Asia.
|reference=None
|publication title=in N. L. Britton et al., N. Amer. Fl.
|publication year=1908
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V9/V9_678.xml
|subfamily=Rosaceae subfam. Amygdaloideae
|tribe=Rosaceae tribe Spiraeeae
|genus=Spiraea
|species=Spiraea stevenii
}}<!--

-->[[Category:Treatment]][[Category:Spiraea]]