Sulphur Knight complex

- Cap convex to expanded, sulphur-yellow, sometimes pinkish-brown or with a reddish-brown centre.
- Gills adnexed, widely spaced, sulphur-yellow.
- Stem smooth, sulphur-yellow.
- Flesh sulphur-yellow, with an unpleasant, strongly pungent smell likened to coal gas.

Grows with oak and hazel in broadleaf woodland and hazel groves in the southern and central parts of the Nordic region.

A complex with several species that have recently attracted attention and which, in addition to T. sulphureum s. str., includes T. hemisulphureum and T. bryogenum. All should be regarded as inedible and suspected poisonous.