Plant of the Week Ttiibboouucchhiinnaa

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Plant of the Week TTiibboouucchhiinnaa LLaassiiaannddrraa oorr GGlloorryy BBuusshh From late summer, through autumn and to winter, purple flowering Tibouchina trees and shrubs dominate Sydney gardens. For decades, these gaudy individuals from tropical rainforests of Central and South America have been popular with Australian gardeners. Wauchope, on the north coast of New South Wales, even celebrates a ‘Lasiandra Festival’ in March each year. In the first half of last century, varieties of Tibouchina urvilleana (then known as T. semidecandra) were common in Sydney gardens, later T. granulosa became very popular. In recent years, new varieties of Tibouchina lepidota, bred by the late Ken Dunstan of Alstonville, have largely replaced the earlier species and varieties1. When Dunstan’s outstanding variety Tibouchina lepidota ‘Alstonville’ is in full flower, it is almost impossible to see green leaves beneath the crown of purple flowers. If you prefer a pink Lasiandra, try Tibouchina granulosa ‘Kathleen’, another gem from Alstonville. There are about 350 species of Tibouchina, a genus in the family Melastomataceae (or Melastomaceae). Most genera are found in the New World, but others are found scattered through tropical areas of Africa, Asia and the Pacific, including 7 genera and 9 species in tropical regions of Australia2. However, Tibouchina is not everyone’s cup of tea! In Hawaii, where plants reproduce vegetatively to form dense thickets in low-lying areas, Tibouchina species are listed as noxious weeds3. , World Distribution of Tibouchina WWoorrrllldd DDiiissstttrrriiibbuutttiiioonn oofff MMeeelllaassstttoommaatttaaccceeeaaeee Maps: Modified from Missouri Botanical Garden: http://www.tropicos.org/Name/40014416?tab=distribution http://www.tropicos.org/NamePage.aspx?nameid=42000202&tab=maps 1 Wikipedia: http://en.wikipedia.org/wiki/Alstonville,_New_South_Wales 2 Plantnet: http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=fm&name=MELASTOMATACEAE 3 Hawaii Administrative Rules, Title 4 Department of Agriculture, Subtitle 6 Division of Plant Industry, Chapter 68, Noxious Weed Rules: http://www.hawaiiag.org/hdoa/adminrules/AR-68.pdf Alison Downing & Kevin Downing, 2.04.2012 Downing Herbarium, Department of Biological Sciences .

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Ab153d570f4a9e24da42206055
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