melanthiaceae: one of many subfamilies into which some classification systems subdivide the Liliaceae but not widely accepted: includes Aletris; Narthecium; Veratrum
liliid monocot family: family of monocotyledonous plants of the subclass Liliidae; mostly herbs usually with petaloid sepals and petals and compound pistils
civil defense: activities organized by civilians for their own protection in time of war or disaster