Ipheion uniflorum
Alani Davis (Wed, 25 Jan 2012 07:24:20 PST)

Though it is very often still listed as Ipheion uniflorum or Tristagma
uniflorum, 'Rolf Fiedler' is considered a selection of Tristagma
peregrinans and Jesse looks like another to me.
http://www.theplantlist.org/tpl/record/kew-290498/
Perhaps Alberto is referring to this.

--
Alani