Working in the environmental management industry I’m privileged to be involved with the conservation and management of several threatened species, mostly flora, throughout Gippsland, Victoria. The central Gippsland plains have had a terrible history of extinctions and drastic reductions in populations of flora. This is especially the case for communities such as grasslands, grassy woodland and swamps which were extensively modified for cattle grazing and cropping. The introduction of rabbits and weed species have had a further impact on these habitats.
Below are some of the plant species which have only just hung on despite these adversities and many now have management plans and efforts to stabilise and hopefully increase populations. All species below are currently listed as threatened under the Flora and Fauna Guarantee (FFG) Act 1988, the key legislation in Victoria for the conservation of threatened species and communities. Some are also listed as threatened under the Environment Protection and Biological Conservation (EPBC) Act 1999, the federal government’s central piece of environmental legislation.
Purple Diuris Diuris punctata is a stunning species of Donkey Orchid found throughout lowland Victoria. In the Gippsland plains it is protected mostly on road and rail reserves in open grassy woodland/grassland communities. Populations can fluctuate from a handful of plants in some years to tens of thousands in good years.
The Gaping Leek Orchid Prasophyllum correctum is one of the rarest orchids in Australia. It once extended throughout the grassy plains of south-east Victoria but is currently only known from two small sites west of Bairnsdale. This species is listed under federal legislation as endangered and there have been various attempts at propagating this orchid with varying successes. Little is known of its requirements in the wild such as pollinators, symbiotic soil fungi and the effect of burning regimes. Currently 19 other Prasophyllum species are currently listed in Victoria as threatened and research is being done on this genus into their biology and ecology.
Matted Flax-lily Dianella amoena is another species associated with open grassy woodland/grasslands and is also listed as endangered under federal legislation. As with Purple Diuris this species is now mostly restricted to road and rail reserves. Once also found in Tasmania it is now apparently extinct there and is currently known from scattered populations from the Gippsland plains to the Grampians in western Victoria.
Matted Flax-lilies develop brilliant purple and yellow flowers in spring and is often identified from other local Dianellas by the toothed margins and mid-rib of each leaf blade.
Dwarf Kerrawang Rulingia prostrata is a nondescript little plant and as it’s species name says it grows prostrate. Although small, it’s trailing branches can spread up to 2m. In spring it develops small light pink flowers and in summer a spiky round seed capsule. This species is restricted to the fringes of wetlands associated with woodland communities.
Dwarf Kerrawang is member of the Sterculiaceae family which typically includes larger trees and shrubs such as Kurrajongs or Flame Trees Brachychiton spp which many people are familiar with.
One of the showiest of Gippsland’s threatened flora is the Wellington Mint-bush Prostanthera galbraithiae. In spring this spindly shrub develops brilliant purple-mauve flowers with a spotted throat. At present it is known only from several populations at two localities, Holey Plains and Dutson Downs. Although present in relatively intact habitats (typically heathy woodland) it is dependant on regular burning regimes for germination and is susceptible to over-grazing by herbivores. This species was named after Jean Galbraith, a local botanist who co-discovered the plant and advocated for its conservation.
Swamp Everlasting Xerochrysum palustre is a tall daisy associated with wetlands and swamps in NSW, Victoria and Tasmania. In Victoria the species is found in small scattered populations mostly due to the extensive draining and modification of wetlands for agriculture but also from weed invasion and grazing by native and introduced species.
Trailing Hop-bush Dodonaea procumbens is a low-growing, prostrate shrub up to 20cm in height with trailing branches. It develops tiny flowers in spring and distinct winged capsules in summer. It inhabits seasonably wet depressions in woodlands, heathland and grassland.
This species was once thought extinct in eastern Victoria but a small population was rediscovered in the Dutson Downs area in 2009. Although not currently listed as threatened under Victoria’s FFG Act it is listed as vulnerable under the federal EPBC Act. It also occurs in low numbers from southern NSW to South Australia.