Standard summer flower

My memory has never been very good. I can't remember the name of this flower, and if I had remembered to write it down somewhere, I can't remember where that would be. The flower shows up every year on a shrub out in the vineyard, not far from our house. It's right along the dirt road, near the old maison du vigneron (a storage shed out among the grapes).

I'd appreciate learning what this plant is called. Anyone?

I've published photos of it before, the last one in July of 2007. This is definitely its time for flowering. It always seems to catch my eye when it's wet with morning dew.

This week's weather is turning out very nice. Sunny and warm with temperatures in the mid to upper 20s (that's around 80ºF). I haven't had to water the vegetable garden lately as we've been having some nice rain in between the sunny spells. Perfect summer weather.

I find I'm repeating myself. We're really tuned into the weather these days as the garden is maturing. What goes on in the sky is important. We've put a lot of time and effort into the garden and we get a little nervous about the quality and quantity of our harvest.