JACK-BY-THE-HEDGE

Jack-by-the - Hedge or Garlic Mustard (Alliaria petiolata) is one of the few plants outside the Allium genus that has a smell or flavour of garlic or onion.  You can use the leaves in salads but they are best picked before the flowers open.

It's a biennial so it produces a rosette of heart-shaped, tooth-edged leaves the first year, and then shoots up to produce its small, white, four-petalled flowers the following year.

As its name suggests, it frequently grows alongside hedges, especially shady ones and unusually it always stands to attention.  The stems stay vertical rather than spreading outwards or leaning.