The one on the left looks like a small malva...perhaps M. sylvestris. The one on the right looks like a tall campanula...perhaps C. lactoflia, latifolia, or persifolia but If I had to bet I'd say latifolia.

I'd say the one on the left is "flower of an hour" (Hibiscus Trionum). Here's a link to check it out:

Here is a link that might be useful: Hibiscus Trionum

The one on the right looks like Nicotiana to me.

Left some type of Malvaceae. On the right Nicotiana. Bit blurry, but thought I would take a stab at it.

Left pic- definitely Hibiscus trionum
Right pic looks like Nicotiana to me