Strobilanthes anisophylla

Evergreen shrub to 1 m or so tall. Leaves opposite, narrow-lanceolate and willowlike, often purple, the leaves of each pair of different size, margin toothed. Flowers pinkish mauve; summer.

Mexico

Source: Spencer, R. (2002). Acanthaceae. 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. (as Strobilanthes anisophyllus)

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Asteranae
order      Lamiales
family       Acanthaceae
genus        Strobilanthes Blume