Common Name: toadflax, oldfield
Species: Nuttallanthus canadensis (L.) D. A. Sutton
Bayer Code: NUTCA

Oldfield toadflax is also known as common or blue toadflax. It is a winter annual or biennial weed that is commonly found blooming in the spring in fields and roadsides. Oldfield toadflax is most often found in the Piedmont and Coastal Plain of North Carolina. The plant can flower from early spring (most common) to late fall (less common) - depending on growing conditions. The small blue flowers have three lobes and basal spurs. The leaves are small, bright green and linear. Small clumps of leaves will form in early spring, and the blue flowers will appear on long green stems shortly thereafter.
oldfield toadflax
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oldfield toadflax
oldfield toadflax
oldfield toadflax
oldfield toadflax
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CharacteristicTypeDescription
Growth Season winter annual weed OR biennial weed 
Growth Habit upright 
Leaflet Number one 
Leaf Margin smooth 
Leaf Hairs none 
Leaf/Leaflet Shape linear/oblong 
Leaf Width <1/2 inch 
Leaf Venation   
Leaf Arrangement alternate 
Root Type   
Flower Color blue/purple