monkshood: a poisonous herb native to northern Europe having hooded blue-purple flowers; the dried leaves and roots yield aconite
aconite: any of various usually poisonous plants of the genus Aconitum having tuberous roots and palmately lobed leaves and blue or white flowers
common polypody: mat-forming lithophytic or terrestrial fern with creeping rootstocks and large pinnatifid fronds found throughout North America and Europe and Africa and east Asia