Representing Germany with stamps in my Dandelion Archive is this stamp.*
It was released in 1977 and has the German for dandelion on the stamp: Lowenzahn
I'm struggling to find the artist who did the illustrations, however I did read in a stamp catalogue that the print run was 12,217,000 - if that's of any interest.
*I also have a first day over of this set this is from, with a lovely embossed dandelion on the envelope - please see March 2013 post on this blog.