Johanna, De Korenbloem (English: The Cornflower) or De Molen van Schennink is a tower mill in Culemborg, Gelderland, Netherlands which was built in 1888 and has been restored to working order.

Johanna remained in the ownership of the Schennink family until 2012, when it was sold to the Stichting Elisabeth Weeshuis.

This drives a lantern pinion wallower with 29 staves, which is situated at the top of the upright shaft.

This drives a pair of 1.40 metres (4 ft 7 in) diameter millstones via a lantern pinion stone nut with 23 staves.

The millstones consist a French Burr runner stone and a Cullen bedstone.