Knotweed (Centaurea jacea) is an herbaceous plant in the composite family (Compositae or Asteraceae). A synonym is Centaurea thuillieri.
In the Netherlands (except Drenthe) and Flanders, it is a common plant of roadsides and ruderal places.
The perennial plant grows 30-70 cm high. The upper leaves are undivided and alternate along the stem. The lower leaves are usually sinuous to feathery.
The flower heads are 2-4 cm wide. They consist of pink to red-purple tubular flowers. The marginal flowers of these are enlarged and sterile. Their enlargement and lateral position make them look like ribbon flowers. The winding leaves in the upper half have a separated, spiny appendage. The flowering period is from June to autumn.
All my life I have been taking photos, however young I was, I tried to take a slightly different picture than the usual family snapshots.
Now, with a professional camera, I take pictures of landscape and nature also art photography and product photography...
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