poison milkweed poison mercury • poison oak · · · Info · Definitions · Synonyms · Characters · · poison milkweed · · Text Common · · Latin · · Scripts 15 · · Length 3 · · Syllables Definitions · · · (noun) milkweed of southwestern United States and Mexico; poisonous to livestock. Synonyms: poison milkweed, horsetail milkweed, Asclepias subverticillata. · · Noun Definition 1 Synonyms · · · horsetail milkweed · · Synonym 1 asclepias subverticillata · · Synonym 2 Characters · · space U+0020 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 k latin small letter k U+006B l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073 w latin small letter w U+0077