Thunbergia grandiflora
naturalizedAcanthaceae

Thunbergia grandiflora

Bengal trumpet

Naturalized (non-native)non-native

Introduced and now reproducing on its own in the wild.

Thunbergia grandiflora is an evergreen vine in the family Acanthaceae. It is native to China, India, Nepal, Indochina and Burma and widely naturalised elsewhere. Common names include Bengal clockvine, Bengal trumpet, blue skyflower, blue thunbergia, blue trumpetvine, clockvine, skyflower and skyvine.

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Seasonality
38 flowering · 1 fruiting annotations · iNaturalist · fetched Jul 2026
JFMAMJJASONDpeak
flowering (peak August) fruiting (peak June)

This is an inference, not a schedule. The curve reflects when observers annotated flowering and fruiting — which tracks observer effort as well as plant behavior, and pools all elevations and islands into one signal. Hawaiʻi’s microclimates vary enormously; a species may fruit in January at sea level and June at elevation. Use this to know when to look, then look.

Gallery · 4 · iNaturalist
open-licensed photos · click any to view its source
Where documented · 32 ahupuaʻa
documented occurrences · iNaturalist + GBIF · iNaturalist 200 · GBIF 117 records