Here is one link to give you an idea of what to search for.

Here is a link that might be useful: Native phlox

imo, i don't believe that is native phlox. isn't it one of those that escaped cultivation.

by all means correct me if i am wrong! i just had to put inmy 2 cents.

I find this phlox in undeveloped areas on native plant rescues. It is much meeker looking than the pictures, the leaves are skinny and the blooms smaller. I'm sure these guys use the best picture they have.

According to Newcomb's, cultivated phlox paniculata has escaped cultivated in New England. However, I do believe phlox paniculata is native to the US originally.

Here is a link that might be useful: USDA site

hmmm, interesting! whenever my field guides call something "garden" or states "escaped from cultivation" i assume it isn't native or it is a cultivar or variety from the native.

i need to stop assuming! :)

Wish I had come here sooner....I know what you're talking about and have some (courtesy of a fellow gardener). I'm sure that I could share a bit if you're interested - I'm on the south shore. Send me an email

Although it's long past the post, the original note "dappled shade/shade in woodlands" makes me wonder if this isn't dame's rocket, Hesperis matronalis, which is European and becoming invasive in a number of states. It's often sold as "wild phlox" although it's actually in the mustard family. Double check to see if it has 4 "petals" or 5. Five = phlox 4 = dame's rocket.