Iochroma 'Alba'

You  can surely see the family resemblance to the much larger trumpet plants, the Brugmansia but the Iochroma are generally hardier and  much more generous in the production of flowers, albeit diminutive ones, throughout the growing season, a large adult plant producing hundreds in a year. Iochroma 'Alba' is a pretty white version with a slight purple flush when the blooms are newly emerged.