This one took me by surprise. It is the European Spindle, ๐ธ๐ข๐๐๐ฆ๐๐ข๐ ๐๐ข๐๐๐๐๐๐ข๐ , which not only is associated with calcareous soils but also was historically rather local in Belgium. In spring you could be forgiven for not noticing the small, greenish-white flower clusters, but now its four-lobed crimson capsules are unmissable. Birds love these and the leaves feed several moth caterpillars, including the aptly-named spindle ermine.
It owes its English name to the wood: the branches, being straight and hard, were used to make spindles for spinning wool. Thereโs not so much call for these nowadays, but it still finds use for artistsโ charcoal.
Quite what this untidy shrub was doing by the side of the Drรจve Saint Michel I donโt know. The soil scarcely seems appropriate. I suspect the seed was delivered from above.