Pinner says: "I LOVE SIRKKA KÖNONENS DESIGNS !" The link doesn't provide any more information so I don't know if this is a one-of-a-kind art gallery piece, or a pattern, or retail, but it sure is gorgeous.
The Metsä Kukkii sweater by textile artist Sirkka Könönen, Finland. Material kit from Taito Pirkanmaa crafts store (online). Even published in early in the Finnish knitting magazine Suuri Käsityö, with instructions.