Lactuca serriola, also called prickly lettuce, milk thistle, compass plant, and scarole (Kompass-Lattich, Zaun-Lattich oder auch Stachel-Lattich in german), is an annual or biennial plant, slightly foetid, that is commonly considered a weed of orchards, roadsides and field crops. The closest wild relative of cultivated lettuce (Lactuca sativa L.). The leaves grow along a spiny stem and get progressively smaller as they reach its top. They emit latex when cut. Many flowers are produced and usually appear in the upper part of the plant.
It is known as the compass plant because in the Sun the upper leaves twist round to hold their margins upright.
It is native to Europe, Asia, and north Africa, and has become naturalized elsewhere.
It´s also edible, read on at wiki.
This plant is growing in masses on our neighnour´s garage roof, and this one settled down in one of our (empty^^) plant pots. I love it´s fabulous design of leaves.
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