couch grass

I'm not very good at grass, sedge and rush identification - I can tell that there are different types, but not what the types are, except for a few cultivated forms like maize and barley. However couch grass (Elytrigia repens) is a problem weed on my allotment (it keeps reinvading from the boundary paths), so I ought to add it to the list.

Bulrush (Typha sp.) also occurs locally, but I may have missed my chance to check which of the two species is present.