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Oxalis dillenii (Slender yellow wood sorrel)
Fabre, Carl

Oxalis dillenii

Oxalis dillenii Jacq.

Slender Yellow Wood Sorrel, Yellow Wood Sorrel, Yellow Woodsorrel

Oxalidaceae (Wood-Sorrel Family)

Synonym(s): Oxalis brittoniae, Oxalis corniculata var. dillenii, Oxalis dillenii ssp. filipes, Oxalis dillenii var. radicans, Oxalis filipes, Oxalis florida, Oxalis florida ssp. prostrata, Oxalis florida var. filipes, Oxalis prostrata, Oxalis rupestris, Oxalis stricta, Xanthoxalis brittoniae, Xanthoxalis dillenii, Xanthoxalis filipes, Xanthoxalis florida

USDA Symbol: oxdi2

USDA Native Status: L48 (N), CAN (I)

The name Oxalis is derived from a Greek word for "sour," referring to the sour taste of the leaves. This plant grows to 15 inches tall and develops a deep tap root. Stems are usually erect. Leaves are palmately divided into 3 heart-shaped leaflets, green to yellow-green, which fold in the evening or when it is cloudy. The yellow flowers are 1/2-1 inch across, with 5 sepals, 5 petals, 10 stamens, and 1 pistil. There are 1 to several blossoms on a slender stem borne in the leaf axils.


From the Image Gallery

8 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Arrangement: Alternate
Leaf Complexity: Trifoliate
Inflorescence: Umbel
Fruit Type: Capsule
Size Notes: Up to about 15 inches tall.

Bloom Information

Bloom Color: Yellow
Bloom Time: Feb , Mar , Apr , May , Jun , Jul , Aug , Sep , Oct , Nov


USA: AR , AZ , CO , CT , DC , DE , FL , GA , IA , ID , IL , IN , KS , KY , LA , MA , MD , ME , MI , MN , MO , MS , MT , NC , ND , NE , NH , NJ , NM , NY , OH , OK , OR , PA , RI , SC , SD , TN , TX , UT , VA , VT , WA , WI , WV , WY
Canada: AB , NB , NS , ON , QC , SK
Native Habitat: Fields, glades, prairies, disturbed areas, and roadsides.

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Fredericksburg Nature Center - Fredericksburg, TX
Pineywoods Native Plant Center - Nacogdoches, TX
Brackenridge Field Laboratory - Austin, TX
Patsy Glenn Refuge, c/o Wimberley Birding Society - Wimberley, TX
Stengl Biological Research Station - Smithville, TX
Jacob's Well Natural Area - Wimberley, TX

Herbarium Specimen(s)

NPSOT 0341 Collected May 26. 1987 in Bexar County by Harry Cliffe
NPSOT 0717 Collected Mar 13, 1994 in Comal County by Mary Beth White

2 specimen(s) available in the Digital Herbarium

Wildflower Center Seed Bank

LBJWC-0142 Collected 2007-07-19 in Travis County by Lady Bird Johnson Wildflower Center

1 collection(s) available in the Wildflower Center Seed Bank


Bibref 1035 - Texas Wildflowers: A Field Guide: Revised Edition (2006) C. Loughmiller, L. Loughmiller, D. Waitt

Search More Titles in Bibliography

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Oxalis dillenii in USDA Plants
FNA: Find Oxalis dillenii in the Flora of North America (if available)
Google: Search Google for Oxalis dillenii


Record Modified: 2023-02-21
Research By: DEW

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