Thunbergia gregorii, commonly known as orange clockvine or orange trumpet vine, is a herbaceous perennial climbing plant species in the family Acanthaceae, native to East Africa and sometimes cultivated as an ornamental vine.

The bright, pure all-orange flowers distinguish it from the related black-eyed Susan vine (Thunbergia alata).

[1] Spencer Le Marchant Moore described the species in 1894, naming it after John Walter Gregory.

[2] The common name of clockvine relates to the vine spiralling upwards in a clockwise direction.

[1] Thunbergia gregorii is an evergreen vine that grows to 8–10 ft. tall, or if left without support can become an extensive groundcover.