I found in Tabucchi's book a funny one: a kind of "japanese parma", just don't know its name as long as I don't read or speak that language (I wish I could definitively):

I found an "american parma" in Doretta Klaber's book as well, viola vallicola, here is a draw of it (you can also find true pictures on the net - only simple flowers):

Is still someone believing that violas we call parma is a specy apart found somewhere in Turkey ? I can't at all :-)
Does someone know other viola making that kind of strange flowers ? I won't ask you why ;o) Ain't I a kind boy ? ;-)

All the best :-)
Thierry.

...but extra petals alone do not make a Parma! That distinction is complete, since Parmas have such different foliage and fragrance and cold tolerance, among other things, from other species we know. So a double Viola odorata is not a Parma, but a single ("normal"-flowered) Parma would still be a Parma.

Is that a double V. mandshurica? I really like the V. vallicola in the drawing, but I doubt such a thing still exists - what a beauty! Of course, probably no fragrance, and that is an equal part of the enjoyment for me.

You're right: double, semi-double or parma, according to the number of petals. I shouldh't have used the word parma :-)
As I've never saw before other violets from the smelling ones having several petals I'm quite surprised and try to understand...

All the best :-)
Thierry.