View source for Oxalis illinoensis

{{Treatment/ID
|accepted_name=Oxalis illinoensis
|accepted_authority=Schwegman
|publications={{Treatment/Publication
|title=Phytologia
|place=50: 467. 1982
|year=1982
}}
|common_names=Illinois wood-sorrel
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Oxalidaceae;Oxalis;Oxalis illinoensis
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Oxalidaceae]]</div><div class="higher-taxon"><small>genus</small>[[Oxalis]]</div><div class="higher-taxon"><small>species</small>[[Oxalis illinoensis]]</div></div>
|volume=Volume 12
|mention_page=page 138, 141
|treatment_page=page 145
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs </b>perennial, caulescent, rhizomes present, with horizontal, white, fusiform tubers or tuberlike thickenings, stolons absent, bulbs absent. <b>Aerial</b> stems 1(–3) from base, erect, 15–40 cm, herbaceous, glabrate to sparsely to densely villous, hairs ± straight, spreading, septate and nonseptate. <b>Leaves</b> cauline; stipules rudimentary; petiole 4–7.5 cm, hairs septate and nonseptate; leaflets 3, green, obcordate, (12–)20–30(–35) mm, lobed 1/5 length, lobes apically truncate, margins green, ciliate, surfaces glabrous, oxalate deposits absent. <b>Inflorescences</b> regular or irregular cymes, 1–3(–6)-flowered; peduncles 3–10 cm. <b>Flowers</b> tristylous, mostly at level of leaves; sepal apices without tubercles; petals yellow, with prominent red lines proximally, 12–18 mm. <b>Capsules</b> oblong-ovoid, 7–10 mm, sparsely puberulent to villous. <b>Seeds</b> brown, transverse ridges brown.</span><!--

-->{{Treatment/Body
|phenology=Flowering Apr–Sep.
|habitat=Slopes, bluffs, ravines, flood plains, mesic forests, sometimes forming dominant ground cover, commonly on limestone, shale, or calcareous loess.
|elevation=200–500 m.
|distribution=Ill.;Ind.;Ky.;Tenn.
|discussion=<p>Differences between <i>Oxalis illinoensis</i> and <i>O. grandis</i> are subtle, but they appear to be correlated with geography. <i>Oxalis illinoensis</i> occupies the western part of the range of <i>O. grandis</i> in the wide sense. The tuberous portions of the rhizomes of <i>O. illinoensis</i> are diagnostic, but they are commonly broken off during collection. M. E. Medley (1993) observed that the two taxa intergrade, and a hybrid population has been identified in Indiana (A. L. Heikens 2003).</p><!--
--><p><i>Oxalis illinoensis</i> is listed as threatened in Illinois and rare in Indiana.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Oxalis illinoensis
|author=
|authority=Schwegman
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Oxalidaceae
|phenology=Flowering Apr–Sep.
|habitat=Slopes, bluffs, ravines, flood plains, mesic forests, sometimes forming dominant ground cover, commonly on limestone, shale, or calcareous loess.
|elevation=200–500 m.
|distribution=Ill.;Ind.;Ky.;Tenn.
|reference=None
|publication title=Phytologia
|publication year=1982
|special status=Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V12/V12_581.xml
|genus=Oxalis
|species=Oxalis illinoensis
}}<!--

-->[[Category:Treatment]][[Category:Oxalis]]