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Very alien-looking plants! I saw some by a local canal a couple of weeks back and had no idea what they were until I saw one posted on iSpot. (Didn't have a camera with me at the time unfortunately.)
This is a very interesting plant spreading thought the world many are edible if not all. Native Americans used Butterbur as a remedy for headache
Lat/Lng: 53.433034722144, -2.2943615913391
OS grid ref: SJ805929
grassland with some wetter marshland