Derwentia arenaria: is a member of the Scrophulariaceae family in company with the exotic Snapdragons and Foxgloves. The Derwentias have had chequered horticultural career. Firstly all species were included in the Veronica and then Parahebe before becoming Derwentia.
Derwentia arenaria is a small, multiple-stemmed shrub. The stems are usually upright. The light green leaves may be entire or with irregular lobes. The flowers are produced in terminal racemes. The flowers vary in colour from pale violet-blue to deep violet-blue. Flowering is profuse and extremely conspicuous. Blooms are carried from September to May.
Derwentia arenaria is found from south-eastern Queensland to the Central West Slopes of New South Wales.
We bought our first plant a couple of years ago. Since then we have planted many specimens throughout our gardens. The species propagates very readily from cuttings and we have built up the numbers, available for planting, rapidly.
Derwentia arenaria is a stunning plant with its long racemes of colourful flowers. The species has proved to be drought tolerant and frost resistant. We have another two species: Derwentia derwentiana and Derwentia perfoliata. Both these Derwentias have proved to be as colourful and hardy as Derwentia arenaria.
Native cottage gardens and rockeries are ideal situations for Derwentias.