Roundleaf Greenbriar

(Smilax rotundifolia)


Family: Smilacaceae


Also Known As:



Weed Photos: Courtesy of Dr. Lambert McCartey. Clemson University. Clemson, SC.

                



Description


Roundleaf greenbriar is a deciduous woody vine capable of either forming thick patches or being very invasive of other vegetation. The leaves of roundleaf greenbriar are heart-shaped with parallel veins; they form alternately on the stems of the vines. Tendrils are produced from the petioles of the leaves to support the plant in climbing. Thorns are formed along the stem. Roundleaf greenbriar spreads by seed and vegetatively into new areas. Small green flowers are produced from spring through summer. The fruit of roundleaf greenbriar is a small black berry. Roundleaf greenbriar is a pest of Northeastern United States, but it can extend west as far as Kansas, Oklahoma and Texas.




Distribution





Germination Dates



3: April-May
4: April
5: April
6: March-April
7: March-April
8: March





Cultural Practices

Roundleaf greenbriar is a pest of landscapes, fence rows and wooded areas as well as clearings and roadsides. The green stems of roundleaf greenbriar persist during the winter. Vines can be cut back or hand pulled.




Herbicide Use

For optimum control, make your herbicide application to roundleaf greenbriar that is young and actively growing. Due to the woody nature of the vines and spreading habit, better results may be obtained with an oil base ester product. Fall clean up using an ester herbicide will provide effective management.




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