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Weed Spotters Network Queensland Which Thunbergia have I got? Weed Identification Sheet INSTRUCTIONS:TO USE THE KEY Read the statements 1 and 1x which offer two alternatives. Choose the statement which is most appropriate to the specimen that you wish to identify. Read the two statements directly below the chosen statement, e.g. 2 and 2x. After choosing one, follow the instructions in the key to the next statement. * = naturalised species. All Thunbergia species are non-native. 1. Annual herb up to 35 cm high; leaves sessile; flowers white ................. .........................................................Thunbergia annua Prohibited weed Not yet recorded in Australia 1x. Climbing vine; leaves with petioles ..............................................go to 2 Thunbergia annua is a weak herb, branching from the root; stems with long white hairs when young. Leaves are sessile, oblong-lanceolate, obtuse or rounded tip, tapering to an acute base, 5–10 cm long, 1–2 cm wide, with scattered hairs along the veins of the lower surface. Flowers are white, about 2 cm long, on short peduncles; bracteoles ovate, strongly keeled and pilose along the keel, 5–7-nerved. Capsules are thin walled, pubescent, the fertile part globose, the beak arising from it very abruptly; seeds smooth. Native to Central Sudan and Upper Nile. Thunbergia annua, Photo: S. Navie Thunbergia alata, Photo: S. Navie 2. Petiole winged, flowers orange or yellow (rarely white) often with black throat......................................*Thunbergia alata, black-eyed Susan 2x. Petiole not winged.......................................................................go to 3 Prepared by K. Stephens + M. Laidlaw 2016 Thunbergia alata, Photo: S. Navie For Weed Spotters Network enquiries contact the Queensland Herbarium on (07) 3896 9323 Or visit http://www.qld.gov.au/environment/plants-animals/plants/herbarium/weeds This fact sheet has been developed for the Weed Spotters Network Queensland, a joint initiative of the Department of Science, Information Technology and Innovation and the Department of Agriculture and Fisheries. Queensland Government 3. Flowers white or blue...................................................................go to 4 3x. Flowers yellow and red ..................................Thunbergia mysorensis (a cultivated garden plant, doubtfully naturalised) 4. Flowers single or paired in leaf axils, white .........................................................*Thunbergia fragrans, not declared Thunbergia mysorensis, Photo: K. Stephens There is also a species considered native in North Qld, T. arnhemica which is very similar to this species, and may prove to be the same species when a taxonomic revision of the group is undertaken. T. arnhemica does not occur in SEQ. 4x. Flowers in terminal racemes, blue or white, leaves variable ...............................*Thunbergia grandiflora. Restricted (Category 3) weed Thunbergia grandiflora, Photo: S. Navie Thunbergia grandiflora, Photo: S. Navie Thunbergia fragrans, Photo:S. Navie Thunbergia grandiflora, Photo: K. Stephens Annual Thunbergia, Thunbergia annua, is a prohibited invasive plant under the Biosecurity Act 2014. www.business.qld.gov.au/industry/agriculture/species/declared-pests/weeds/annual-thunbergia. All sightings of annual Thunbergia must be reported to Biosecurity Queensland (13 25 23) within 24 hours of the sighting. It must not be kept, moved, given away, sold or released into the environment without a permit. Blue Thunbergia, Thunbergia grandiflora, is a restricted (category 3) invasive plant under the Biosecurity Act 2014. http://www.business.qld.gov.au/industry/agriculture/species/declared-pests/weeds/blue-thunbergia. Restricted (category 3) invasive plants must not be given away, sold, or released into the environment without a permit. For more information: ANDREWS, F.W. (1956). The Flowering Plants of the Sudan 3: 189. Sudan Government, T. Buncle & Co Ltd: Arbroath, Scotland. BARKER, R.M. (1986). A taxonomic revision of Australian Acanthaceae. Journal Adelaide Botanic Gardens 9: 1–286.