Fistulina hepatica Schaeff. ex Fr. Beefsteak Fungus or Ox Tongue, Langue de boeuf, Fistuline hépatique, Leberpilz, Májgomba (tapló), Lingua di bue, Biefstukzwam. Bracket 8-25cm across, 2-6cm thick, usually single, tongue-shaped or semicircular; upper surface pinkish to orange-red and finally purple-brown; rough with rudimentary pores, especially toward the margin; moist to tacky. Tubes up to 15mm deep; arising free, but adhering in maturity; whitish or yellowish. Pores 3 per mm, circular; whitish at first, bruising reddish brown. Stem none or rudimentary; short, thick, blood red. Flesh thick, succulent; mottled, dark flesh-pink with lighter veining, with bloodlike sap; reminiscent of raw meat. Odor pleasant. Taste sourish. Spores ovoid, smooth, 4.5-6 x 3-4µ. Deposit pinkish salmon. Habitat singly or sometimes several in a cluster on the base of living oaks or chestnuts, also dead hardwood stumps. Frequent; common in the East. Common in Europe and found in North America especially eastern areas. Season July-October. Edible-good. Comment Infected oak timber has a much richer, darker color and is much sought after by furniture makers. Photographs three and four come from Ted Green, many thanks Ted.
James Tyler of Taylor Hard Woods in Wiltshire has sent me a bunch of photographs of oak wood that is infected with Fistulina, it has lately been in high demand for the wonderful rich brown discolouration, the infected wood is known as' Brown Oak' note the photograph of the chair seat James sent. Many thanks James and to your company.