Ganoderma pfeifferi Bres. (illustrated 20% life size) Bracket 10–45cm across, up to 10cm thick, semicircular, margin obtuse, sessile or on a thick, rudimentary stem; red-brown or maroon to almost black, margin cream-coloured; upper surface concentrically grooved, glossy, as if varnished. Flesh pale wood-coloured; soft. Tubes 5–20mm long; rusty brown. Pores 2–2.5 per mm, circular; pale greyish, bruising brown. Spores 9–11×5–7¼, elliptical-ovate, truncate at one end; brown. Hyphal structure trimitic; generative hyphae with clamp connections. Habitat on stumps of oak; all year. Uncommon. Not edible. Note this was named Ganoderma resinaceum in my first book.
