Hägg=Bird cherry=えぞのうわみずざくら

Pingu and Pinga came back from Japan and thought that
Lund became much greener than when they left. Pinga found this flower in the neighbourhood and asked her colleague what it's called. It's hägg in Swedish. It was a bit difficult to find out what it's called in Japanese as it's native to northern Europe and northern Asia. Pinga has never heard of the name 蝦夷上溝桜(えぞのうわみずざくら). Both english and Japanese name has "cherry" in it.
今ルンドで満開の蝦夷上溝桜は日本では北海道で見られる木だそうです。北欧は、スウェーデン、ノルウェー、フィンランド、ロシアに育っているとのことです。