sufficient of poison bark dryness
bark is not covering. poison_ash is not poisonous_plant. poison_ash is poisonous_plant. water_hemlock is poisonous_plant. bark is covering. hemlock is plant_toxin. hemlock is poisonous_plant. mustard_gas_poison is not poisoning. hemlock is not poisonous_plant. water_hemlock is not poisonous_plant.