Monday’s Really Tough Jigsaw Puzzle

Today’s jigsaw puzzle, Dahlia Flower, is a tough one. There is a pattern to it, so you might want to check out the picture of it if you hit a tough spot.
Maybe even play an easier version, too!
Yes, I had a request for a tough puzzle and as usual, I try to follow through on most requests.
Enjoy?

Beginner     Easy     Medium     Hard     Tough       Extra Tough