Flower IDs for Flower Mandalas appreciated

I am using the attached flower images to create flower mandalas (see http://www.flowermandalas.org for my collection so far) and would appreciate help identifying them. I am, I'm afraid, hopelessly bad at identifying even the common garden flowers attached here and am grateful for your help.

Best,
David

 

2 is Aquilegia, columbine.
3 is a rose.

 

1 Pelargonium
4 may be Heliopsis helianthoides
5 Cosmos sulphureus
6 Cosmos bipinnatus
7 Osteospermum

 

6. Looks like a Dahlia to me.

 

On second thought that may be correct.
A picture of the foliage would help greatly with these ID's

 

Thanks for your help. Here's the full shot of #6, which shows a little of the foliage. Sorry, but the flower is in Seattle and I'm near Boston, and it didn't occur to me to shoot the foliage at the time.

 

OK, #6 is definitely a Dahlia.

 

Thanks for confirming. In the future (ie, next spring) I'll also take pictures of the whole plant when I don't know what I'm shooting.