food writer states about C. rutilus and C. vinicolor: References Further reading Arora D. (1986) Mushrooms Demystified. Berkeley, CA: Ten Speed Press. Nilsson S. & Persson O. (1977) Fungi of Northern Europe 1: Larger Fungi (Excluding Gill Fungi). Penguin Books. Boletales Boletales genera Taxa named by Rolf Singer