Thank you, catspa! That's it, for sure :-)

Fatamorgana, Weakley's key lists six Calystegia species for North America. Those species are divided into subspecies, when appropriate, in order to more thoroughly describe population characteristics. For instance, C. sepium ssp. angulata and ssp. limnophila have white flowers. The other three C. sepium ssp. have pink flowers. Each subspecies name represents features that separate it from the others (type of pubescence, shape of leaves, etc.). So all five of these subspecies are C. sepium, and the ssp. designation just adds more information about that population's appearance.

2. sensitive fern Onoclea sensibilis http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=l300

Thank you. Pycnanthemum virginianum seems to be a good match for the first plant. I'll go back this weekend to see if the second one is blooming. That might make it easier to identify.