white saddle - helvella crispa

coloration pattern research field mycology europe japan china non-edible pond squantz fairfield species fall science nature biodiversity connecticut england dangerous identification foraging poison poisonous als sclerosis lateral amyotrophic toxic carcinogenic intoxication severe monomethylhydrazine curley wrinkled helvel cap irregular crispa helvella autumn decomposer fungus fungi common elfin mushroom saddle white