Unknown Mushroom

On the 26th of May I found a large honey coloured mushroom growing in wood chip and bark mulch on Quay Parade Road, by Sainsbury's. (SS 66030 93108).

It was in considerable numbers and fruiting in many stages of maturation.  It completely puzzled me as I found it impossible to work out the family it belongs too. I believe it to be an Agrocybe, specifically Agrocybe putaminum, which is not indigenous.

Since then the weather has been either dry or very wet and this fungi has continuously fruited for the last month..Another wood chip fungi that is fruiting in the same location is Psilocybe cyanascens.

Agrocybe erebia/Dark Fieldcap

Last year I was in Milford haven for a few days and went to some places where I know mushrooms are regular. There was one particular mushroom that puzzled me at the time. It had a dark brown, almost black cap and prominant umbo. It was large and fleshy and had veil remnants. The stalk was clearly tapered and darkening towards the base. Its cap was shiny when wet but matt when dry. I thought, given its strong features that it would be easy to identify. It wasn't and I didn't know what it was, until today.

Through sheer luck whilst searching for something else I came across it in a book, then searched online to help my verify it.
It turned out to be Agrocybe erebia/Dark Fieldcap.

The cap is dark and wavy, with a prominant umbo. The stem is thick, fibrous and tapers at the base where the colour gets darker towars the end. It's gills are an umber-brown colour.

It also has a ring that sometimes can be found. When young the veil resembles an opaque white membrane which collapses with the most gentle of touches. Click on the photo below to view the veil better.

below is a phot of  more mature examples. As can be seen the umbo is clearly prominant but the colour of the cap is much more brown.