Semi-woody shrub to about 2 m tall. Leaves opposite, ovate, with lobes or large teeth, stalk short. Flower clusters terminal, flat-topped. Flowers pale violet with purple spots, the throat with yellow mottling; summer.
J. punctata Ruiz & Pav. from S Chile is occasionally cultivated; it has double-toothed leaves.
J. sinclairii (Hook) Kränzl. from New Zealand is a smaller subshrub with leaves to about 8 mm long and flowers that are lilac to white, spotted with red.
Source: (2002). Scrophulariaceae. In: . Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.