Tricholoma portentosum (Fr.) Quel. Deu.: Grauer Ritterpilz. Bot. syn.: Agaricus portentosus Fr.
Classic texts: WaldFeld 1947.
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.