Albatrellus ovinus is a white to cream-colored mushroom, but is often tan and drab colored and less distinctive. Unlike many related members of the genus Albatrellus, A. ovinus is mycorrhizal as it is found on the ground near coniferous trees, rather than a saprophyte or parasite on wood. Mycorrhizal in coniferous forests in temperate and boreal climates; appearing in late summer and autum. Pileus 4-20 cm across, 3-10 mm thick, fleshy, usually circular but sometimes irregular; slightly convex, flat, or shallowly depressed in age; rarely fused; dry; smooth at first, then becoming cracked with pale to yellowish flesh exposed inside cracks; whitish or buff when young, aging to tan. Pore surface desceding the stem. Flesh is whitish aging to yellowish. Stipe 3-10 cm long, 1-4 cm wide; central or a bit off-center; whitish to tan; smooth or very finely velvety. White spore print.
Basidiospores 4-5 × 2.5-3.5 micrometers in size; smooth; hyaline; subglobose to broadly elliptic; inamyloid in Melzer’s Reagent; walls fairly thick. The hyphal strucutre is monomitic.
Application of KOH instantly turns the usually whitish flesh to golden yellow in color. Grows gregariously, sometimes in dense clusters. Both odor and taste are not distinctive.
Common name: Sheep polypore. Polyporus ovinus is a previous, out-dated scientific name.
Created: 2007-04-17 20:39:40 EDT (-0400) by Ron Pastorino (Ronpast)
Last modified: 2019-04-25 08:53:21 EDT (-0400) by Oregon Mycological Society (OMS)
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