Hi Gerd ,
I suppose thats two different genus - both locations are far away .
The second locationis not so far from Chile - but after my informations are Phycella not listet for Argentina .
One of this plants could be Eustephia , a other idea is Hieromiella .
Could you please send me ( privat ) a copy of this picture of the book from A.Hoffmann ?
The problem is in this area have not worked so many botanists -and if there is build a new road ....