A flower spike with a fleshy axis and sessile flowers, usually enclosed in a spathe. The most striking example from Canoe Country is the large white flower of the Wild Calla Lily ( Calla palustris). From the Latin, spadix, "palm branch."
In botany, a spadix (pl. spadices) is a type of spike: an inflorescence with small flowers crowded on a thickened, fleshy axis. The term is applied to certain monocotyledons, especially members of the Family Araceae called arums or aroids. In these flower heads there is typically also a spathe present: a large, usually showy and solitary, bract that either subtends (lies just below) or partially encloses the spadix.