Chickweed. A plant which grows wild near streams and on wasteland and may be eaten raw in salads, cooked in the same way as spinach or used to make soup.
Pestle puffball. A type of mushroom not generally considered to be edible but can be eaten when young.
Greencracked brittlegill. A variety of wild mushroom which, as its name implies, is a sort of olive green with darker green markings and with creamy brittle gills. Most brittlegills resemble other ones that are inedible and some will cause gastric problems. You can normally detect what type it is by the flavour. A tiny tasting will immediately reveal whether or not it is edible, but it is worth spitting it out immediately if you detect a bitter taste.