Watch out for its stranglehold

Some of you will be familiar with this rather beautiful flower and its silvery seedheads in the background. Unfortunately, despite its beauty, it is an invasive species and widespread. This is one of three species of Clematis that occur in Alberta, the other two being the native Western Clematis and the Purple Clematis/Blue Clematis. This yellow species was introduced from Japan as an ornamental garden plant, but has now spread to natural areas where it chokes out and kills native plants, shrubs and trees. Taken at Erlton/Roxboro Natural Area on 27 July 2011.

The Erlton/Roxboro Natural Area is located on the east side of the Elbow River above the southwest community of Roxboro. It was completed in 1996. This is one of the richest areas in Calgary for wildlowers, but unfortunately, many non-native plants and shrubs have taken over much of the area - such as Caragana, Goat's-beard, Baby's Breath and Yellow Clematis.