Arboriculture & Urban Forestry 32(4): July 2006 159 Table 2. The 50 most common taxa in rank order. Botanical name Queensland brush box (Lophostemon confertus) Snow-in-summer (Melaleuca linariifolia) Purple-leaf cherry plum (Prunus cerasifera ‘Nigra’) Prickly-leaved paperbark (Melaleuca styphelioides) Willow bottlebrush (Callistemon salignus) London plane (Platanus × acerifolia) Yellow gum (Eucalyptus leucoxylon) Willow myrtle (Agonis flexuosa) Desert ash (Fraxinus angustifolia spp. angustifolia) Gum tree (Eucalyptus spp.) Weeping bottlebrush (Callistemon viminalis) Red-flowering gum (Corymbia ficifolia) Pin oak (Quercus palustris) Bottlebrush (Callistemon spp.) Double-rose Cherry plum (Prunus × blireana) Bracelet honey myrtle (Melaleuca armillaris) Narrow-leaved peppermint (Eucalyptus nicholii) Prunus spp. Norfolk Island hibiscus (Lagunaria patersonia) Sweet gum (Liquidambar styraciflua) Cherry plum (Prunus cerasifera) Lilly pilly (Acmena smithii) Kanooka, water gum (Tristaniopsis laurina) Spotted gum (Corymbia maculata) White cedar (Melia azedarach) Wallangara white gum (Eucalyptus scoparia) Lemon-scented gum (Corymbia citriodora) Red ironbark (Eucalyptus sideroxylon) Sweet pittosporum (Pittosporum undulatum) Silver birch (Betula pendula) Smooth-barked apple (Angophora costata) Oriental plane (Platanus orientalis) Claret ash (Fraxinus angustifolia ssp. oxycarpa ‘Raywood’) Plane (Platanus spp.) Crimson bottlebrush (Callistemon citrinus) Kings Park bottlebrush (Callistemon ‘Kings Park Special’) Willow-leaved hakea (Hakea salicifolia [syn. H. saligna]) Prunus ‘Wrightii’ Silky oak (Grevillea robusta) Cootamundra wattle (Acacia baileyana) Unknown species Callery’s pear (Pyrus calleryana) Elm (Ulmus spp.) Blackwood (Acacia melanoxylon) Oleander (Nerium oleander) Hakea (Hakea spp.) Christmas berry (Photinia × fraseri ‘Robusta’) Camphor laurel (Cinnamomum camphora) Totals Myrtaceae makes up 467,282 plants (52% of the total popu- lation surveyed), most of which were of Australian origin, with only seven of the 28 genera in that family exotic (1,612 plants or 0.4% of plants; the exotic genera comprised mem- Number 61,959 46,837 35,402 31,049 27,427 25,870 20,677 19,952 19,614 18,099 17,422 17,411 16,114 15,939 14,315 14,000 13,431 12,865 12,521 12,353 11,933 11,707 10,758 10,526 10,059 9,829 8,779 7,849 7,672 7,633 7,128 6,834 6,336 5,853 5,783 5,777 5,689 5,678 5,061 5,056 5,016 5,001 4,961 4,857 4,801 4,301 4,217 4,071 646,422 Percentage of total 6.9 5.2 3.9 3.4 3.0 2.9 2.3 2.2 2.2 2.0 1.9 1.9 1.8 1.8 1.6 1.5 1.5 1.4 1.4 1.4 1.3 1.3 1.2 1.2 1.1 1.1 1.0 0.9 0.8 0.8 0.8 0.8 0.7 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.5 0.5 0.5 0.5 0.5 0.5 71.60 bers of the Myrtles, e.g., Temu [Luma apiculate {DC.} Burret] as well as Meterosideros spp.). The importance of Australian native species is also illus- trated by the presence of the genus Eucalyptus, which had the ©2006 International Society of Arboriculture Native/exotic N N E N N E N N E N N N E N E N N E N E E N N N E N N N N E N E E E N N N E N N — E E N E N E E
July 2006
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