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Rough Buttonweed, Poor Joe - Diodia teres


Family: Rubiaceae - Madder family Genus Common Name: Buttonweed Native Status: NativeDicot Annual Perennial Herb
Diodia teres - Rough Buttonweed, Poor Joe. Diodia teres is a wildflower many consider to be a weed. While it can be a creeping plant with reclining stems, in my experience it is more likely to be upright than its equally invasive cousin, Virginia Buttonweed (D. virginiana).

Found in:
AL, AR, AZ, CA, CT, DC, DE, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, MI, MO, MS, NC, NJ, NM, NY, OH, OK, PA, RI, SC, TN, TX, VA, WI, WV

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Diodia teres

Distribution of Diodia teres in the United States and Canada:
USDA Map temporarily unavailable.
Blue=Native; Grey=Introduced

Map from USDA Plants Database:
USDA, NRCS. 2017. The PLANTS Database (http://plants.usda.gov, 16 Jan 2025). National Plant Data Team, Greensboro, NC 27401-4901 USA.

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Site: Walker County, GA Date: 2010-August-21Photographer: Gerald C. Williamson
Nikon D60
Tamron SP 90MM f/2.8 AF Macro
The flowers of Rough Buttonweed are pink, whereas those of Virginia Buttonweed are white. The leaves are also narrower relative to their length, and the stipules have stiff bristles.
Diodia teres
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Diodia teres initially published on USWildflowers.com 2010-08-21; Updated 2017-02-12

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