Native spurge. No redeeming features that I know of and, like all euphorbias, the sap can be an irritant if it gets on your skin in sunshine and dangerous if you get it in your eye. Handle with care.
Vendée - 20kms from Atlantic coast. "We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
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"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
https://www.google.com/search?q="Euphorbia+lathyris."&client=firefox-b-d&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjOvcbA4ffsAhUOQxUIHazuB04Q_AUoAXoECA0QAw&biw=1280&bih=579
Be careful white sap is toxic.
When large they can look superb.
Pics taken below were in A National Trust property.