white saddle - helvella crispa

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