Spreading, variable shrub mostly to 2 m tall. Leaves oblong to linear-lanceolate, to 12 cm long, 5 cm wide, spreading or pointing downwards, entire or with a few minute teeth. Flower clusters lateral, to 15 cm long; summer. Flowers white to pale blue.

New Zealand

Includes many plants at one time placed in H. salicifolia but H. stricta has no leaf bud sinus.

Source: Spencer, R. (2002). Scrophulariaceae. In: Spencer, R.. 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.