Oxalis dillenii

{{Short description|Species of flowering plant}}

{{speciesbox

|image=Oxalis dillenii (16982149333).jpg

|taxon=Oxalis dillenii

|authority=Jacq.

|synonyms_ref={{Cite web |title=Oxalis dillenii Jacq. {{!}} Plants of the World Online {{!}} Kew Science |url=http://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:177944-2 |access-date=2023-07-20 |website=Plants of the World Online |language=en}}

|synonyms={{collapsible list|bullets=true

|title=Synonymy

|Oxalis cornicuata var. dillenii {{Small|(Jacq.) Trel.}}

|Xanthoxalis dillenii {{Small|(Jacq.) Holub}}

|Oxalis arborea {{Small|Anon.}}

|Oxalis boreaui {{Small|P.Fourn.}}

|Oxalis corniculata f. diffusa {{Small|(Boreau) Fiori}}

|Oxalis corniculata proles diffusa {{Small|(Boreau) Rouy}}

|Oxalis corniculata var. lyonii {{Small|(Pursh) Zucc.}}

|Oxalis diffusa {{Small|Boreau}}

|Oxalis dillenii var. radicans {{Small|Shinners}}

|Oxalis florida subsp. prostrata {{Small|(Haw.) Lourteig}}

|Oxalis lyonii {{Small|Pursh}}

|Oxalis prostrata {{Small|Haw.}}

|Oxalis recurva var. floridana {{Small|Wiegand}}

|Oxalis sanguinolaria {{Small|Raf.}}

|Xanthoxalis dillenii var. piletorum {{Small|(Wiegand) Holub}}

|Xanthoxalis lyonii {{Small|(Pursh) Holub}}

}}

}}

Oxalis dillenii, the southern wood-sorrel,{{Cite web |title=Slender Yellow Woodsorrel, Southern Yellow Wood-sorrel, Dillen's Oxalis - Oxalis dillenii |url=https://uswildflowers.com/detail.php?SName=Oxalis%20dillenii |access-date=6 May 2022 |website=uswildflowers.com}} slender yellow woodsorrel, or Dillen's oxalis,{{ITIS|id=29074|taxon=Oxalis dillenii|access-date=6 May 2022}} is a species in the woodsorrel family. Like other Oxalis species, the leaves of this plant resemble clover leaves, with three leaflets. Oxalis dillenii can be confused with other small yellow flowered species in North America, such as Oxalis florida.{{Cite web |title=Digital Atlas of the Virginia Flora {{!}} Oxalis dillenii Jacquin |url=https://www.vaplantatlas.org/index.php?do=plant&plant=3099&search=Search |access-date=2024-09-04 |website=www.vaplantatlas.org}} The flowers have five yellow petals that are {{cvt|4|to|10|mm|in}} in length. The leaflets are {{cvt|1|to|2|cm|in}} wide with pointed hairs. The fruits are rather brown and are {{cvt|1.5|to|2.5|cm|in}}. It is often considered a weed, and can be found worldwide, but likely originated in North America.{{cite book|last1=Gleason & Cronquist|title=Manual of Vascular Plants of Northeastern United States and Adjacent Canada|date=1991|publisher=The New York Botanical Garden|edition=2nd}}