Bicolor Clock Vine
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Bicolor Clock Vine
P Native Photo: P.S. Sivaprasad
Common name: Bicolor Clock Vine
Botanical name: Thunbergia bicolor    Family: Acanthaceae (Acanthus family)
Synonyms: Thunbergia wightiana, Schmidia bicolor

Bicolor Clock Vine is a critically endangered climbing subshrub with spectacular hanging bicolor flower racemes. Flower bract are showy, 2-2.5 cm across, heart-shaped-round, upper half orange red, lower half pale yellow. Calyx is an entire or slightly finely-scalloped ring. Flower are bluish or yellowish, prominent, the tube cylindric or swollen, curved, the limb oblique; petals 5, twisted to the left in bud. Leaves are opposite, up to 18 x 10 cm, ovate-triangular tapering, flat or rounded at base, palmately veined, rounded toothed. Fruit is a capsule, spherical below, suddenly narrowed to a barren sword-shaped beak; seeds 2 in each cell, spherical. Bicolor Clock Vine is endemic to Souther Western Ghats.

Identification credit: P.S. Sivaprasad Photographed in Silent Valley National Park, Kerala.

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