A girl stands beside a hanging Thunbergia mysorensis cluster of yellow and red flowers and buds

Thunbergia mysorensis (Indian Clock Vine)

Native to southern India, this evergreen woody vine in the acanthus family twines through tropical montane forests and can grow about 33 feet long. Its glossy green leaves accompany hanging flower clusters up to 3 feet long. Each flower is about 2 inches long, with a gaping yellow throat and dark red lobes that curl backward. Sunbirds pollinate it in the wild. It has received the Royal Horticultural Society’s Award of Garden Merit. It has naturalized in Queensland, Australia, where it can invade bushland. Photographed in the central Andes mountain range of Colombia.

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A girl in a navy shirt stands among long hanging Thunbergia mysorensis flower clusters beside a gray wall

A girl in a black shirt stands among hanging red and yellow Thunbergia mysorensis flower clusters

Yellow Thunbergia mysorensis flowers show red lobes and long pale stamens against a dark background

Two open Thunbergia mysorensis flowers have yellow throats and red lobes beside red bracts

Yellow and red Thunbergia mysorensis flowers and pointed red bracts hang along a dark stem

Two yellow Thunbergia mysorensis flowers with red lobes reveal long pale stamens beside red bracts

Overlapping yellow Thunbergia mysorensis flowers show red lobes and pale stamens among pointed red bracts

A hanging Thunbergia mysorensis cluster carries one open yellow and red flower above buds

Two yellow and red Thunbergia mysorensis flowers hang beneath red bracts against blue sky

One open Thunbergia mysorensis flower has a yellow throat and red lobes beside yellow buds and red bracts

A yellow and red Thunbergia mysorensis flower hangs sideways against blue sky with pale stamens visible

A dark insect rests on a yellow and red Thunbergia mysorensis flower beneath pale hairy anthers

A yellow Thunbergia mysorensis flower shows curved red lobes and pale hairy anthers beside pointed red bracts

One upright yellow Thunbergia mysorensis flower reveals long pale stamens above a red lower lobe against blue sky

Long red and yellow Thunbergia mysorensis flower clusters hang among green leaves against blue sky

A girl in pink boots stands beside a gray wall covered with green Thunbergia mysorensis leaves and hanging flowers