It is not 4 O'Clocks, kmj! Come on, think about it -- that's not a native plant in the USA -- and John the Conquer is so very well known and native. For gosh sake, why not ask me if you can substitute use a Louisiana Yam or a Sweet Potato -- "it's in the same family."
And cognitive dissonance, have you ever seen the roots of Saint John's Wort? All you need to do is to look at the old catalogues. The root is illustrated over and over in the catalogues, you know. And the images are obviously of Impomoea jalapa.
And if y'all want to know if we sell something, please just check our complete inventory, don't ask here. It is online and updated monthly at http://luckymojo.com/inventory