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Rough Buttonweed, Poor Joe - Diodia teres


Family: Rubiaceae Madder family Genus Common Name: Buttonweed Native Status: Native
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).

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

Map from USDA Plants Database:
USDA, NRCS. 2009. The PLANTS Database (http://plants.usda.gov, 30 Sep 2014). National Plant Data Center, Baton Rouge, LA 70874-4490 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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All content except USDA Plants Database map Copyright Gerald C. Williamson 2014
Photographs Copyrighted by the named photographer