Hi Blondy and welcome to GoY. The statement that you have a 'boggy area and need evergreen plants' possibly needs expanding on. Is this area boggy all the time? How large is it? Why are you wanting evergreens?

Thank you Moon grower.The area is damp most of the year and could be under water after a lot of rain.I wanted evergreens so that there is some structure in the winter months.We have a Gunnera but it dies down and is covered over with one or two larger leaves.The area is approx. 10' x 8' Any suggestions greatly appreciated.

Copy and paste the link below into you web browser seems like there are lots for you to choose from

http://navigator.gardenpilot.com/ShrubsWetConditions.html

That is a huge variety of trees/shrubs. I was struggling to think of any though Cornus and Ilex should have come quickly to mind. Blondy, 10' x 8' is not all that large an area and the Gunnera is going to grow very big as the years go by. I would suggest that you consider the evergreen(s) to be a temporary resident and don't be too upset about taking it out when need be.