View source for Ivesia gordonii

{{Treatment/ID
|accepted_name=Ivesia gordonii
|accepted_authority=(Hooker) Torrey & A. Gray in War Department [U.S.]
|publications={{Treatment/Publication
|title=in War Department [U.S.], Pacif. Railr. Rep.
|place=6(3): 72. 1858
|year=1858
}}
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=F
|label=Selected by author to be illustrated
}}
|basionyms={{Treatment/ID/Synonym
|name=Horkelia gordonii
|authority=Hooker
}}
|synonyms={{Treatment/ID/Synonym
|name=Potentilla gordonii
|authority=(Hooker) Greene
}}
|hierarchy=Rosaceae;Rosaceae subfam. Rosoideae;Rosaceae tribe Potentilleae;Ivesia;Ivesia sect. Ivesia;Ivesia gordonii
|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 Potentilleae]]</div><div class="higher-taxon"><small>genus</small>[[Ivesia]]</div><div class="higher-taxon"><small>section</small>[[Ivesia sect. Ivesia]]</div><div class="higher-taxon"><small>species</small>[[Ivesia gordonii]]</div></div>
|volume=Volume 9
|mention_page=page 230, 231, 234
|treatment_page=page 233
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>green, ± tufted, sometimes rosetted; taproot stout, not fleshy. <b>Stems</b> prostrate to erect, (0.2–)0.5–4 dm. <b>Basal</b> leaves tightly to loosely cylindric, (1–)3–20(–25) cm; sheathing base ± glandular abaxially, otherwise glabrous; petiole 0.5–8 cm, hairs 0.2–0.5 mm; leaflets (6–)10–25 per side, (1–)2–13(–18) mm, glabrous or ± hirsute or villous, glandular-puberulent or -pubescent, lobes (2–)4–8(–15), linear or narrowly oblanceolate to obovate, apex rarely setose. <b>Cauline</b> leaves 1(–2), not paired. <b>Inflorescences</b> 5–50(–70)-flowered, 1–8(–11) cm diam.; glomerules 1–several. <b>Pedicels</b> 1–3(–5) mm. <b>Flowers</b> 5–12 mm diam.; epicalyx bractlets linear to narrowly elliptic, (0.5–)1–3.5(–4) mm; hypanthium turbinate to campanulate, (1.5–)2–4(–4.5) × 2–4(–5) mm; sepals (2–)2.5–5(–6) mm, obtuse to ± acute; petals yellow, narrowly oblanceolate to narrowly spatulate, (1–)1.5–3 mm; stamens 5, filaments 1.3–2.5 mm, anthers yellow, sometimes red-margined, 0.5–1 mm; carpels (1–)2–4(–6), styles 2.5–4.5(–6) mm. <b>Achenes</b> grayish brown to mottled brown, ± 2 mm.</span><!--

-->{{Treatment/Body
|distribution=w United States.
|discussion=<p>Varieties 4 (4 in the flora).</p><!--
--><p><i>Ivesia gordonii</i> is the most widespread species of the genus, occurring from Washington to Montana, south to central California and Colorado. The species can be distinguished from other members of sect. <i>Ivesia</i> by the relatively deep hypanthium, which is about as deep as wide. Four varieties are provisionally recognized here (B. Ertter and J. L. Reveal 2007), with the likelihood that future work may indicate additional and/or alternate circumscriptions. Populations that are difficult to assign to a variety can be found where the recognizable taxonomic units come together, for example, in northeastern Utah and western Wyoming, involving <i></i>var.<i> gordonii</i> and <i></i>var.<i> wasatchensis</i>, and in California and central Idaho where <i></i>var.<i> alpicola</i> and <i></i>var.<i> ursinorum</i> tend to merge.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Leaflets 7–13(–18) mm, glabrous or sparsely hirsute or villous marginally; stems (1–)1.5–4 dm; inflorescences usually branched, 2–8(–11) cm diam., glomerules (1–)2–6(–10), ± capitate.
|[[Ivesia gordonii var. wasatchensis|Ivesia gordonii var. wasatchensis]]
|-id=key-0-1
|1
|Leaflets (1–)2–7(–9) mm, hairy or ± glabrous except marginally ciliate; stems (0.2–)0.5–2.5 dm; inflorescences simple or branched, 1–3(–5) cm diam., glomerules 1(–3), ± capitate to loosely congested
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Stems usually prostrate to ascending, rarely nearly erect, usually dark reddish, minutely glandular or glandular-puberulent to -pubescent; leaves to 0.8 cm diam.; anthers usually red-margined.
|[[Ivesia gordonii var. ursinorum|Ivesia gordonii var. ursinorum]]
|-id=key-0-2
|2
|Stems usually ascending to erect, sometimes decumbent, usually greenish, rarely reddish, hirsute to villous, glandular-puberulent to -pubescent; leaves to 1.5 cm diam.; anthers rarely red-margined
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Stems usually hirsute to villous, sometimes densely so, glandular-pubescent or eglandular; basal leaves (3–)5–10(–15) cm; flowers 7–12 mm diam.; e Idaho and w Montana to Utah, Wyoming, and w Colorado.
|[[Ivesia gordonii var. gordonii|Ivesia gordonii var. gordonii]]
|-id=key-0-3
|3
|Stems not or sparsely hirsute to villous, glandular-puberulent or -pubescent; basal leaves 2–8(–10) cm; flowers 5–9 mm diam.; s Washington to California and e to w Montana.
|[[Ivesia gordonii var. alpicola|Ivesia gordonii var. alpicola]]
|}
</div></div><!--

-->{{#Taxon:
name=Ivesia gordonii
|author=
|authority=(Hooker) Torrey & A. Gray in War Department [U.S.]
|rank=species
|parent rank=section
|synonyms=Potentilla gordonii
|basionyms=Horkelia gordonii
|family=Rosaceae
|distribution=w United States.
|reference=None
|publication title=in War Department [U.S.], Pacif. Railr. Rep.
|publication year=1858
|special status=Endemic;Selected by author to be illustrated
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V9/V9_357.xml
|subfamily=Rosaceae subfam. Rosoideae
|tribe=Rosaceae tribe Potentilleae
|genus=Ivesia
|section=Ivesia sect. Ivesia
|species=Ivesia gordonii
}}<!--

-->[[Category:Treatment]][[Category:Ivesia sect. Ivesia]]