ASCLEPIAS n.
A genus of plants including the milkweed, swallowwort, and some other species having medicinal properties. Asclepias butterfly (Zoöl.), a large, handsome, red and black butterfly (Danais Archippus), found in both hemispheres. It feeds on plants of the genus Asclepias.
BACK n.
A large shallow vat; a cistern, tub, or trough, used by brewers, distillers, dyers, picklers, gluemakers, and others, for mixing or cooling wort, holding water, hot glue, etc. Hop back, Jack back, the cistern which receives the infusion of malt and hops from the copper. -- Wash back, a vat in which distillers ferment…