Crepis tectorum L.

Crepis tectorum L.. Crepis tectorum, commonly referred to as the narrowleaf hawksbeard or narrow-leaved hawk's-beard, is an annual or winter annual plant between 30 and 100 centimetres in height. Originating in Siberia before being introduced to Canada in 1890, the narrowleaf hawksbeard is an invasive species. It has one branched, hairless and leafy stem during maturity, and yellow leaves which are less than 0.5 inches (13 mm) wide and arranged in an alternate manner.