Thunbergia grandiflora (Rottl.) Roxb.

Blue Trumpet Vine

Climbing shrub. Leaves to 20 cm long, ovate to elliptic, roughly hairy, margin toothed or lobed. Flowers solitary and axillary or occasionally in clusters. Calyx cup-like. Petal tube to about 7 cm long, violet; summer.

N India


T. laurifolia Lindl. from India is similar but has narrower leaves and flower stalks about 2 cm (not 3-5 cm) long.

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.

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Distribution map
kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Asteranae
order      Lamiales
family       Acanthaceae
genus        Thunbergia Retz