Disc-osteophyte Complexlumbar

Oxyporus populinus - Treppenförmiger Steifporling

No. 77 - a finding from the Bavarian Alps.
Widespread but not common species
O. populinus is a perennial Wound parasite on dead or dying hardwoods already in sunny, dry locations. It grows there in tile standing strains in southern Germany preferred to maple, but otherwise also beech, ash, willow, apple, etc. The medium-sized console-shaped, usually around 3 - 8 cm protruding hats are thick and sharp. you are in all parts whitish with the felted top is like overgrown with moss. Some collections have therefore a certain similarity to fruit bodies of Buckelporlings. The pores, however, are tiny and measure 5-7 per mm. Typically, the laminated tubes, which can be clearly seen while the cross (see Figure 3). Lt. H. Jahn should they meet "annual layers.
The species is in Germany in the deciduous forests spread as far, in the Rhine-Main area, it is rather rare. It causes a white rot active. Based on the tube layers and the small pores is O. populinus easily determined. Microscopically it is carried round, small spores, fixed missing buckles on the septa and their encrusted Zystiden. They could be confused with the also pileate O. corti cola with larger pores and more elliptical spores. Occasionally seen in hardwood and resupinate fruit body with the nearly same micro-features such as O. populinus but also elliptical spores. This is Oxyporus obducens , the "crust-shaped Steifporling" which frequently as a variety of O. populinus called and was presented as No. 45 in the blog.
The shown fruiting bodies were photographed in April 2010 on the Isar at Wallgau of ovarian willow trees.