Laetiporus sulphureus (Bull. ex Fr.) Murr. syn. Polyporus sulphureus Bull. ex Fr. Sulphur Shelf, Schwefelporling Polypore soufré, Chicken of the Woods. Bracket 10–40cm across, fan-shaped or irregularly semicircular, thick and fleshy, usually in large tiered groups; upper surface uneven, lumpy, and wrinkled, suede-like, lemon-yellow or yellow-orange drying pallid or straw-coloured; margin obtuse. Flesh at first succulent and exuding a yellowish juice when squeezed, but white and crumbly with age. Taste pleasant and slightly sourish, smell strong and fungusy. Tubes 1.5–3mm long, sulphur-yellow. Pores 1–3 per mm, circular or ovoid, sulphur-yellow. Spores white, ellipsoid to broadly ovate, 5–7 x 3.5–4.5um. Hyphal structure dimitic with generative and binding hyphae; generative hyphae without clamp-connections. Habitat deciduous trees, usually oak but common also on yew, cherry, sweet chestnut and willow. Season late spring to autumn, annual. Common. Edible when young and fresh, considered a delicacy in Germany and North America. Distribution, America and Europe. Comment there is a form of this fungus which has a white pore surface, and some authors recognize this as Laetiporus sulphureus var. semialbinus.