Illustrations: Hvass 277; LH 73; NB 1294; WD 931.
The spores of all the annual polypores described above do not blue when placed in solutions containing iodine.
Coriolus versicolor (Fries) Quélet Many zoned polypore
Cap: 25-60 mm. Stem: absent.
Description: [Plate 46].
Cap: semi-circular, flattened, thin, tough and flexible when fresh with the surface velvety and marked with smoother, paler concentric zones giving a pattern of yellow-brown, grey or darker greenish grey zones; the margin is thin and is the palest of the zones and may be wavy or lobed.
Tubes: white with small, round and rough-edged to angular white or cream-coloured pores which become yellowish with age.
Flesh: white, tough and continuous with the tube tissue and so not allowing one to detect any difference between the tissues.
Spore-print: white.
Spores: medium sized, oblong and hyaline under the microscope, and 6-8 × 2-3 µm; not blueing in solutions containing iodine.