Part 42

Medium sized to small, fleshy-tough fruit-body with downy or crust-like top Oxyporus, Fomitopsis & Heterobasidion

27. Spores borne in labyrinth-like or elongate pores, or cap either poorly developed or absent, and only resupinate pore-surface present 28

Spores borne in distinct pores on well-developed woody fruit-bodies 31

28. Spores borne in labyrinth-like pores Daedalea & Daedaleopsis

Spores borne in elongate pores like very thick gills, or fruit-body completely resupinate 29

29. Spore-layer lining elongate pores Lenzites (white) & Gloeophyllum (brown)

Spore-layer consisting of a resupinate pore-layer 30

30. Pore-layer totally resupinate; flesh very poorly developed Fibuloporia and related genera

Fruit-body resupinate or developing ill-formed caps at the margin; flesh well-developed and quite tough Datronia, Gloeoporus & Bjerkandera

31. Fruit-body with a distinct stem 32

Fruit-body sessile or with a poorly developed stem, or if merely with a basal swelling then pores bruising 33

32. Pores dark-coloured but spores pale-coloured in mass Coltricia (also see Phaeolus below)

Pores white or creamy, foot often darkened or black, and spores hyaline Polyporus

33. Pores brightly coloured, red, lilaceous or orange to apricot-colour 34

Pores never as brightly coloured, cream, white, grey or in some shade of brown 35

34. Pores red to orange-red Pycnoporus

Pores lilac to violaceous, or lilaceous orange to apricot colour Hapalopilus (orange-apricot) & Hirschioporus (lilaceous)

35. Pore-surface brown or dark grey and spores often colourless 36

Pore-surface white or creamy, or yellow; spores hyaline 38

36. Pore-surface firm and grey Bjerkandera

Pore-surface greenish yellow, bruising brown or yellow-brown and darkening with age 37

37. Fruit-body lacking a stem, rust-brown, breaking easily, cheesy and with silky sheen Inonotus

Fruit-body with a broad basal hump, fibrillose spongy with yellow margin to cap Phaeolus

38. Tubes forming a layer quite distinct from the flesh; fruit-body fleshy and tough 39

Tubes not forming a layer distinct from the flesh; fruit-body woody or corky 43

39. Pore-surface bright yellow; upper surface yellow or orange Laetiporus

Pore-surface white 40

40. Fruit-body medium to large, shell-shaped, whitish brown or silvery grey on top; on birch Piptoporus