known destroying angel mushroom large genus distributed eastern asia probably india deadly poisonous member section related death cap fruit bodies mushrooms white small medium sized caps diameter somewhat ring firm unlike mushrooms typically spored basidia spore bearing cells basidia entirely spored people fatally poisoned china consuming mushroom fatally poisoned incident molecular analysis shows species close phylogenetic relationship toxic white var taxonomy classification phylogeny discovered species specimens white typically referred realized collections referred european species actually comprised taxa new science region specimen located colleagues performed phylogenetic analysis based sequences white bodied toxic species results support clade containing lethal species white fruit bodies spored basidia similar north american species closer phylogenetic relationship var spored white lethal species china specific epithet derives latin word destructive refers poisonous nature mushroom classified section genus species section share following characteristics spores strongly elongated shape flesh short gills reach edge cap abruptly cut formed sac like species contain description cap diameter initially egg shaped convex age slightly depressed center cap surface smooth white cream colored center margin cap edge non non partial veil remnants hanging cap margin flesh white gills free attachment stem white whitish crowded closely height long tapering plentiful arranged tiers stem roughly cylindrical slightly tapering upward apex slightly expanded surface white whitish smooth small scales base stem roughly spherical wide distinct edge thin free limb height surfaces white ring near stem thin white persistent torn stem expansion cap tissues fruit body turn yellow drop potassium applied spores spherical nearly rarely broadly ellipsoid measure hyaline translucent absorbing stained melzer reagent thin walled smooth small spore bearing cells basidia club shaped spored rarely spored slender projections attach spores long similar species similar species originally described united_states comparison differs lower placement ring stem smaller spores typically different structure american specimens abundant inflated cells white asian species var resemble spored habitat distribution fruit bodies grow groups ground coniferous forests known type locality survey indian species authors mention collections identified locations indian provinces explain material collected identified spored basidia description matches field observations suggest mushroom associates plant deciduous tree found southern provinces china mushroom abundant warm spring rains march april seen july content distribution main alpha beta tissues cap stipe determined high performance liquid cap highest content total reaching dry weight dried tissue content stem dry weight lowest content total dry weight content alpha beta especially alpha cap stem higher content especially gradually higher cap stem study reported presence additional chinese study concluded species highest mortality rate toxic mushrooms china estimated grams fresh mushrooms contains sufficient cause death kilogram adult march people consumed mushroom survived people died southern provinces china consuming mushroom toxic species widely biological research chemical agents essential protein synthesis toxic obtained fruit bodies collected natural habitats consequently expensive success reported directly grown liquid culture concentration fruiting bodies authors suggest possible increase production growth conditions compounds fruit bodies contain unique coupled acid derivative named discovery identification chemical report naturally occurring acid derivative nitrogen nitrogen carbon carbon nitrogen bond new compound determined toxic shrimp test activity variety human cancer cell lines compounds isolated fungus include found mushrooms
Amanita exitialis