Blue Thunbergia

its younger stems are square in cross-section and bear oppositely arranged leaves on stalks 4-12 cm long.

these leaves are variable in shape and their margins usually have several large teeth or small pointed lobes.

its pale blue, violet or mauve trumpet-shaped flowers (3-8 cm long and 6-8 cm across) have a pale yellow or whitish coloured throat.

each flower is borne on a long stalk (4-5 cm long) and has two leafy bracts (15-40 mm long) at its base.

its fruiting capsules, when produced, are rounded with a long tapered beak (2-5 cm long).