Invasive Plants of Oklahoma

Maps for confirmed county distributions in Oklahoma are by Oklahoma Biological Survey and should be considered works in progress.


Verbascum thapsus, Common mullein

Common mullein is a common plant in much of America. A biennial that remains in the rosette stage during the first year, flowers during early summer of the second year and dries to brown stalks by fall.

Photos: Forest & Kim Starr, United States Geological Survey, Bugwood.org & Chris Evans, River to River CWMA, Bugwood.org & Mary Ellen (Mel) Harte, Bugwood.org