Ça ressemble beaucoup au Coréopsis 'Early Sunrise'
http://www.gorgetopgardens.com/perennials/coreopsis-earlysunrise.html
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Here is a little song I wrote
You might want to sing it note for note
Don't worry be happy
In every life we have some trouble
When you worry you make it double
Don't worry, be happy......
Bobby McFerrin
Sujet: identification demandé 
Merci alegria