edda: either of two distinct works in Old Icelandic dating from the late 13th century and consisting of 34 mythological and heroic ballads composed between 800 and 1200; the primary source for Scandinavian mythology
ballad: a narrative poem of popular origin
skullcap: a herbaceous plant of the genus Scutellaria which has a calyx that, when inverted, resembles a helmet with its visor raised