La regina della notte è in fiore nelle serre della mostra di succulente di Zurigo, evento che si verifica una volta all'anno e nottetempo. Quando succede, le porte dell'istituzione nata nel 1931 restano aperte fino a tardi, in modo che i visitatori possano ammirare le infiorescenze luminescenti di questo cactus caraibico, il cui diametro può raggiungere i 25 centimetri e che diffondono un sentore di vaniglia. Un episodio raro e di breve durata, perché il selenicereus grandiflorus, questo il nome scientifico del vegetale, consuma molta acqua per portare a buon fine l'operazione.
Al buio per apprezzare
La collezione di piante grasse turicense è una delle più complete e importanti al mondo. Vi sono esposti esemplari del 50% di tutte le specie conosciute.
ATS/dg
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