Common orache (Atriplex patula) is the most common of the six orache species so it is aptly named. It is certainly the most common away from the sea shore where the others are more likely to be seen as common orache is a weed of bare, disturbed ground usually near farms. Common orache is however, quite a confusing plant as it can be so variable; it can be white varying to reddish, it can be erect varying to sprawling, the leaves can be triangular varying to lanceolate, and other variations besides.
Many years ago, back in the days of Nicholas Culpeper (1616-1654), common orache was used as a leaf vegetable and thought to cure all manner of ailments. Now it is just an untidy weed that we either ignore or despise depending on our point of view!