Cosmos sulphureus I believe. They reseed themselves readily. Here is a link that might be useful: The Plant That Keeps On Giving This post was edited by saltcedar on Mon, Jul 1, 13 at 12:02

Boy, you guys are good! Looked up what a Jerusalem Artichoke is and found that it is a wonderful plant I got at our plant swap last year. At that time I had no idea exactly what it was, only that it was a type of sunflower. I compared these seedlings to my mature plant and they are indeed the same. You would think seedlings would be around mom, but, she's on the other side of the garden! As much as I love the mother, I'll be taking up these seedlings. Probably will bring some to our swap this weekend. I'm surprised at how many there are, and I can easily see them getting out of hand. I'll put this plant on the list of ones to deadhead this year. Thank you!

There are many species of Epilobium, some of which have had name changes, like the fireweed. Some are native, some are introduced weeds. There's only one fireweed though, by whatever name. Watson's willowherb is a common garden weed, I think it's Epilobium ciliatum now, used to be Epilobium watsonii. Dry or damp, sun or shade, tall and rank or short and sparse. Seeds, no runners. The one in your garden is probably the Watson's although you may also have others like Epilobium minutum in dry spots. I'm sure bboy is much more knowledgeable about the various species than I am, I usually do well enough just going by 'Epilobium species'. What you have in the photos on the Weeds forum sure look like Watson's willowherb gone to seed. They've done really well this year with the cool damp spring. But the photos do need to be larger to really see. I'm just guessing from the silhouette.

Right on macranthos. I looked it up in google wiki and I see it also has a great name "Elegant Feather" some reports says it can be eaten but I think I'll skip that part. It is a very nice looking plant. Thanks