New Clues to the Violet Mystery

READER ALERT:  This post is for wildflower nerds.

Too much wind today to go back on the river, so I went back to Skidmore woods to revisit my mystery white violet.  (The small, fragrant, pure white, un-veined variety I wrote about in my post for April 2.)  I found a couple of clues that might yet lead to discovering its name. 

First, I saw one plant of purple flowers, right in the middle of the patch.  Same size, same leaf shape, same basal-leaves-only configuration, same fuzzy stems, same fragrance.  But purple, not white.  Just one purple plant among dozens and dozens of white ones.  Could it be a variety of the same species?  A hybrid?  A mutation?  Hmmmm.  I just don't know.

Second, I turned a pure-white one over, and discovered its spur was purple.  Just the spur, not the backs of the petals like Canada Violet.  Well that should be a distinguishing feature, I thought as I pored over my guide books later.  To no avail.  Audubon's, Newcomb's, Peterson's,  even Britton & Brown's.  Not a single early-blooming, pure white, unveined, basal-leaved, fragrant, purple-spurred violet (with a possible all-purple variation) could I find.   Anybody else have a clue?

Then I found another entirely different violet, this one not in the woods but out in a sunny, grassy spot.  The richest, deepest, most radiant purple, with a fragrance -- no, a perfume -- as deep as its color.  This, too, had a quite distinctive feature:  the lower outside petals were folded up, unlike any other violet I've ever seen.  And once again, while searching my books, I never found a picture or description of this violet.  What shall I call it, then, when I record it in my journal?  Guess I'll call it "Purple Perfumed." Unless somebody out there can tell me its official name.

Postscript:  I looked through H. H. Howard's Plants of Saratoga and Eastern New York and found a violet that might be my Purple Perfumed one.  Viola odorata, or English Violet.  Not a native, maybe escaped from gardens.  Certainly very lovely.  But I still haven't got a name for that fragrant white one.