Blue Flowers?

Can someone help me with this type of blue flower shown in this Wikipedia article?





http://en.wikipedia.org/wiki/Blue_flower





Thank you.

Blue Flowers?
Flowers have always been symbols for the unfulfilled desires of Man... In Sumer it was Gilgamesh searching the secret plant of immortality, in 19th cent. Germany the obscure 'blue flower was the ideal of the romantic poets. by Konrad Knauber.





There are about 161 blue flowers, but this one, I am having a hard time locating. I have found one that is an exotic flower, native to Helgoland, located 44 miles off the German coast line. This is all I really could find, sorry...
Reply:I'm not positive, but it looks like either a Morning Glory or Clematis.
Reply:I'm sure it is blue petunia.
Reply:sorry, can't identify them, but here's a list of all the blue flowers