Tubes and flesh: rust-colour; pores at first yellow, but finally red-brown.
Spore-print: yellow-brown.
Spores: medium sized (8-9 × 7-8 µm) and globose under the microscope. It grows on various broad leaved trees, especially ash where it causes a spongy, white heart-wood rot. The flesh contains hyphae with thick, brown walls.
Illustrations: LH 63; WD 961.
Plate 45. Woody fungi—annual polypores
![[Larger illustration]](#467779198995390083_illo143lg.png.id-2806753663202212478.wrap-0.html.html){kind=link}
Phaeolus schweinitzii (Fries) Patouillard
Cap: 100-300 mm, bracket-shaped or tub-shaped, dark brown with a knobbly, velvety, roughened and grooved surface; margin at first golden yellow.
Stem: absent or short, thick and brown.