, grows on willows and causes their heart-rot. It is a rust-brown, woody fungus with a hard crust and brown tubes and flesh. The spore-print is white and composed of small, spherical, hyaline spores, 5-6 µm in diameter. The flesh contains thin- and thick-walled hyphae.
Illustrations: LH 63; WD 993.
Plate 47. Woody Fungi: Spores brown and borne within tubes—fruit-body perennial
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Oxyporus populinus (Fries) Donk
, grows on various sorts of broad-leaved trees, particularly poplars and often becomes covered in mosses and algae. It has a pale buff or cream-coloured cap, white flesh, pores, tubes and spores.
Illustrations: LH 67.
Cryptoderma pini (Fries) Imaz
, grows on conifers often several feet above the ground. It has a woody, deeply cracked upper surface, dark red-brown flesh, tubes and pores. Its spores are small, broadly ellipsoid and brown.