The Brown Elfin Saddle of western North America. A healthy specimen of left and on the right one infected by the fungal parasite Hypomyces cervinigenus.
A Spring and Early Summer species widely encountered in temperate regions and often confused with morels. It has proved poisonous to some people at least.
2010.09.26 Lower Austria, Leithagebirge - Pfaffenberg (mixed forest of Quercus cerris, Quercus pubescens and Carpinus betulus, 348 m AMSL).I could only determine genus; for species identification microscopic features would be necessary (spores, asci).German name (genus): hrling