John The Conqueror Root. Sometimes the spelling and pronunciation are bastardized to "johnny cockeroo" or any number of other forms. OLD southern Negroes used to call it "Johnny Cockeroo" as a 'slang' replacement for the correct, scientific name because they did not have access to books on the herb. What you seek, however, is the Conqueror Root, a root used in "mojo" bags as an agent to either ward off bad luck/the devil or invite good luck/women/prosperity.

I have studied the blues and its history for years and I welcome any chance to be of help.

May The Road Rise To Meet You,

Stevangelist