"Thunbergia laurifolia", Laurel clock vine or Blue trumpet vine, is native to India and the Indomalaya ecozone, the species occurs from Indochina to Malaysia. It is locally known as kar tuau in Malaysia and rang jeud in Thailand.
Similar species: Lamiales
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http://keyserver.lucidcentral.org/weeds/data/03030800-0b07-490a-8d04-0605030c0f01/media/Html/Thunbergia_grandiflora.htm
http://keyserver.lucidcentral.org/weeds/data/03030800-0b07-490a-8d04-0605030c0f01/media/Html/Thunbergia_laurifolia.htm
http://keys.lucidcentral.org/keys/v3/eafrinet/weeds/key/weeds/Media/Html/Thunbergia_grandiflora_%28Blue_Thunbergia%29.htm Posted 9 years ago, modified 9 years ago
laurel clock vine (Thunbergia laurifolia) usually has relatively narrow leaves that are almost entire or have shallowly lobed or toothed margins. Its leaves are hairless (i.e. glabrous) and are borne on relatively short stalks (usually less than 3 cm long).
blue thunbergia (Thunbergia grandiflora ) usually has relatively broad leaves bearing relatively large pointed lobes and/or toothed margins. It leaves are usually hairy (i.e. pubescent) and are borne on relatively long hairy stalks (4-12 cm long). Posted 9 years ago