More grass and sedge ID's please

[Johnny81]

Apologize I'm posting a lot lately but all for my work experience. All taken from Grand Union Canal Warwickshire.
1.
2.
3.Common Couch?
4.One of the rye grasses?
5.What is this, looks like water mint growing?

Many Thanks

[Dorts]

Johnny.
From what I can see;
1. Reed Canary-grass - Phalaris arundinacea.
2. Greater Pond Sedge - Carex riparia. (height of plant would help ).
3. Couch-grass - Agropyron repens.
4. Italian Rye-grass - Lolium multiflorum. (awned spikelets)
5. Cecid Gall on Germander Speedwell caused by the Gall Midge Jaapiella veronicae.
Dorts.

[Johnny81]

Thank you Dorts is Agropyron repens the same as Common couch Elytrigia repens (a syn)?
The sedge wasn't very tall say less than a meter 650mm approx. Got some Trifid-Bur marigold today a first for me.

[Dorts]

Originally Posted by Johnny81

Thank you Dorts is Agropyron repens the same as Common couch Elytrigia repens (a syn)?
The sedge wasn't very tall say less than a meter 650mm approx. Got some Trifid-Bur marigold today a first for me.

Yes, Elytrigia repens is the currently used name fo Couch Grass. It is sometimes difficult for me to keep up with the constant changes, having learnt all the latin names of years gone by.
That height is fine for the sedge.
Trifid Bur-marigold is a great find, never common and often grows with Nodding Bur-marigold, so worth looking out for also.
Dorts.