scarlet bonnet

"Atheniella adonis", which has the recommended name of scarlet bonnet in the UK, is a species of agaric in the family Cyphellaceae. Found in Asia, Europe, and North America, it produces small orangish to reddish mushrooms with caps up to 1.2 cm in diameter and thin pinkish-white stems reaching 4 cm long. The fungus typically grows in conifer woods and peat bogs, suggesting a preference for acidic environments.