Fungi in my pots

I have a collection of this fungi growing in my courgettes, squash and gourds. I had some of this at my old allotment in Jesmond, I'm the horse manure which was spread under my raspberry plants.

Using my river cottage book on mushrooms & fungi I've identified this as Cup fungi, from the Peziza family. This is a poisonous variety, because it always grows on soil.

I originally wondered if it was Jelly Ear, but his grows on dead tree branches, not bare soil.

Thank you John Wright (whom I've actually met), for your informative book!