Thank you both for answering! I've heard the name before, just never "met" the plant/flower. And, rhizo, I might have had better luck at the nursery if I had been able to find someone who speaks English. Quite frustrating. Again, thank you, wonderful Garden Web people!

I think it may be either Zinnia 'Profusion Cherry' or 'Profusion Fire'. Here is a link that might be useful: Zinnia 'Profusion Cherry'

Definitely A. hippocastanum. Indian horse chestnut has a different leaf shape and flower, freezes back periodically even here in the Seattle area (Zone 8) - I seriously doubt it is actually hardy to Zone 7. There is an apparently universal misperception that the 0-10F, 10-20F etc. refer to how cold it gets in each zone rather than it being an averaging of how cold it gets. So to be a successful planting as low as Zone 7 Indian horse chestnut would probably have to be able to sail through occasional temperatures below 0F in a given location. I've seen indications made by effects of cold winters on specimens in my area that Indian horse chestnut is hardy to about 10F. The range given for Zone 7 is 0-10F and - especially if they were a commercial source - it seems someone may want to push the tree's ability a little bit. So they might say the tree is hardy to Zone 7, because the top of the range for Zone 7 is 10F. Of course, it being a wild species there could be some variation in hardiness between different forms. But I doubt there is a great range of genetic material of this particular item being grown in North America.

I'm not familiar with acmella repens but google images show it to have red stems & leaf veins which I can't detect in the OP's pics. I think the plant in question is wedelia. Wedelia has attractive glossy green leaves and lots of little yellow flowers. It's aggressive to the point of being invasive.