2010.04.01 Vienna I. district (Volksgarten near Hofburg, 177 m AMSL).Branches cut back radically; I suppose that this is done to try and fight Cameraria ohridella, but that's just a guess of mine.German name: Rosskastanie
Aesculus californicaCalifornia buckeye. Buckeye flowers are deadly for European honeybees, although that fact doesn't stop the honeybees from visiting the buckeyes in droves. Native bees coevolved with the buckeyes and are not bothered by the tree's toxicity. There are also occasional reports of livestock poisoning. Given these tidbits, this is not the tree to plant next to orchards or paddocks. Otherwise, enjoy. Photographed along the Ohlone Greenway in Berkeley, CA.