I have 2 kinds of thistles growing wild, pictures attached. One gets about 5-6' and is very prickly with white hairs on the undersides of the leaves - it's the smaller plant in the pictures and is the last picture - and I'm guessing it might be a bull thistle (cirsium vulgare)? The other is a newcomer, is about 3' in a shady spot with smooth shiny leaves (on both top and bottom of leaves) and not really prickly at all, and it's about ready to flower, I have no idea what this is and have attached 2 pictures of it. Can anyone ID these for me? I was just reading an interesting article from the Xerces society at this link:
and would like to be able to differentiate. Thanks!