Bengal clock vine
துன்பேர்சியா கிராண்டிஃப்ளோராതൻബെർജിയ ഗ്രാൻഡിഫ്ലോറনীলবনলতা
Thunbergia grandiflora Roxb.
- light
- Full sun
- water
- Medium
- tall
- 6.0 m
- wide
- 2.0 m
Acanthaceae
Also called Bengal trumpet, Bengal Clock Vine, Bengal Clockvine, Blue Trumpetvine, Blue sky vine
Formerly Flemingia grandiflora, Pleuremidis grandiflora, Thunbergia adenophora, Thunbergia chinensis, and 4 more
When it flowers
Flowers all year in the tropics.
Read from iNaturalist photographs of it in flower. A month counts at 50% of the best month's flowering share (smoothed over three months) and 10% of its flowering count, from at least 100 flowering observations in the band.
If a child, a pet or anyone may have eaten a plant, contact a doctor or vet straight away, or call the National Poisons Information Centre (AIIMS, New Delhi) on 1800 116 117, free and open 24 hours.
Something wrong with it?About it
- Grows as
- LianaKew's checklist, not yet checked
- Climate
- Wet tropicalKew's checklist, not yet checked
- Wild in
- C. Nepal to S. China and Pen. MalaysiaKew's checklist, not yet checked
- Light
- Full sun (6 h or more)Read from RHS and Wikipedia, checked by a majority of its sourcesBacked by both sources. Sources differ: RHS full; Wikipedia full, part
- Height
- 4.0 m to 8.0 mRead from RHS, one source
- Spread
- 1.5 m to 2.5 mRead from RHS, one source
- Water
- Average: moist, well drainedRead from RHS and Wikipedia, checked by a majority of its sourcesBacked by both sources
Not known yet: heat, hottest it survives.
In other languages (12)
- Spanish
- Flor de cera, Emperatriz, Tumbergia trepadora
- Chinese
- 大花老鴉嘴, 大鄧伯花, 山牵牛
- Portuguese
- Tumbérgia-azul
- Dutch
- Grootbloemige Thunbergia, grootbloemige thunbergia
- Chinese (China)
- 大花老鸭嘴, 山牵牛
- Czech
- thunbergie velkokvětá
- Japanese
- ベンガルヤハズカズラ, ウリバローレルカズラ
- French
- Thunbergie à grandes fleurs
- Hebrew
- תונברגיה גדולת-פרחים
- Thai
- สร้อยอินทนิล
- Russian
- Тунбергия крупноцветковая
- Lithuanian
- Didžiažiedė tunbergija
Where this comes from
- iNaturalist, read 2026-10-24, CC0-1.0 (observation counts)
- Wikidata, read 2026-10-26, CC0-1.0
- Kew's checklist, read 2026-10-24, CC-BY-4.0
- RHS, read 2026-10-25, fact, cited
- Wikipedia, read 2026-10-25, fact, cited
- Wikimedia Commons, read 2026-10-24, CC BY-SA 4.0
- iNaturalist, read 2026-10-25, CC0
- iNaturalist, read 2026-10-25, CC BY
- iNaturalist, read 2026-10-25, CC BY-SA
- 3D model: Thunbergia grandiflora (built for Vanagrha) by Vanagrha, own
A fact “checked by a majority of its sources” was settled by a vote of the pages it was read from, not by a person reading it; one marked “one source” rests on that page alone. Anything else not marked checked has not been checked yet. Where nothing is known, the page says so rather than guess.