nomenclatural questions

[Susan Farmer]

   Farwell publishes T.grandiflorum forma orbiculare in 1918.  Louis-Marie
   *reports* T.grandiflorum VAR orbiculare in 1940 (with the Farwell
   citation).

   Is this considered an orthographic variant or a Comb. Nov.?
   If a comb. nov., how is it then cited?
   Is the case any different if the reported variety is listed as a synonym?
   Does the ruling change depending on *when* the "incorrect" type
        was published.


   Is platipetala for platypetala considered an orthographic variant?

Thanks,
Susan Farmer
sfarmer at goldsword.com