A Variety of White Pale Impatiens
From Steve Young: I was down along the Mohawk Bike Trail in Niskayuna, Sche. Co. this afternoon and saw a many white flowers of the pale impatiens, then I saw them with extra lobes on the petals. I had never noticed them before. Photos below.
New York Flora Association Blog 
September 10, 2009 at 3:27 am
I ran across a publication on Google Books from 1877 that mentions seeing white flowers on pale jewelweed.
September 5, 2009 at 12:40 pm
Wow! That is just so fascinating! Are you sure this isn’t another species altogether, maybe a new mutation? Have you ever seen this variation before?
September 6, 2009 at 2:57 am
Must be a new mutation since they were on the same plant as normal yellow flowers. I didn’t check the internet to see if others have seen them before.