Bingo! It is definitely Penstemon. I had hit a dead end with this one, so I am grateful for everyone's help. Who knows; maybe someday I can answer a question or two. Cheers, Doug

I thought it reminded me of the Morning Glory, but the flowers are smaller. I think the suggestion that it is Convolvulus arvensis has merit - from what I've found quickly, though, I am wondering if my lovely "find" has an evil down-side? Should I NOT be encouraging this? It is not very wide spread (yet), but is much prettier than the ice plant and ivy it has popped up among. From what I've read, I am wondering if I am dancing with the devil?

Rangoon creeper, - Quisqualis indica?

Such a beautiful plant. I miss it from my youth in San Antonio. I managed to get one to grow and flower here in Northern Virginia, but it died the second year. Enjoy it!