Perennial to nearly 2 m tall. Leaves opposite, in whorls of 3-4, each to about 10 cm long, 2 cm wide, more or less lanceolate with a long-pointed tip. Flower clusters terminal, to 20 cm or more long, sometimes with a few small side branches; late summer to autumn. Flowers crowded, pale blue to violet.
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.
Veronica longifolia 'Blauriesin'
A robust plant with bright blue flowers. [V. 'Blue Giantess']
Veronica longifolia 'Schneeriesin'
To about 80 cm tall with deep blue flowers.