Gymnoschoenus sphaerocephalus | |
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Buttongrass in December in Tasmania | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Clade: | Commelinids |
Order: | Poales |
Family: | Cyperaceae |
Genus: | Gymnoschoenus |
Species: | G. sphaerocephalus |
Binomial name | |
Gymnoschoenus sphaerocephalus | |
Gymnoschoenus sphaerocephalus, commonly known as buttongrass, is a species of tussock-forming sedge from southeastern Australia. [1] It forms part of a unique habitat in Tasmania. [2]
It was originally described as Chaetospora sphaerocephala by Scottish botanist Robert Brown in his 1810 work Prodromus Florae Novae Hollandiae et Insulae Van Diemen , [3] before being given its current binomial name in 1858 by Joseph Dalton Hooker. [4]
G. sphaerocephalus is a perennial sedge species which forms a clump or tussock. The leaf blades reach 50 cm (20 in) in length, and 0.10–0.25 cm (0.04–0.1 in) in width. [1] The round flowerheads arise out of the tussock, on culms which are up to 1 m (3 ft) high. They are around 1.5–2.0 cm (0.6–0.8 in) in diameter and made up of flattened spikelets 0.5 cm (0.2 in) long. Its root system is a mass of fleshy carbohydrate-rich rhizomes, which are edible. [5]
In New South Wales it is found from Gibraltar Range (and Myall Lakes on the coast) south to Robertson. [1] In Victoria the plant is known from at least two locations, one to the east of Melbourne in the Beenak State Forest, and the other location being on the eastern side of the Grampians National Park in western Victoria. It is much more abundant and widespread in Tasmania, where it is common in the western part of the state. [2]
G. sphaerocephalus grows in damp nutrient-poor soils, and in Tasmania forms a low grassland or moor in which it is the dominant shrub. Associated primitive plants include club mosses such as Lycopodiella lateralis , and Selaginella uliginosa and the ferns Gleichenia dicarpa and G. alpina . Despite the wet climate, buttongrass is relatively flammable and the ecological community is adapted to regular burning. [2] The leaves of G. sphaerocephalus have the lowest recorded phosphorus content of any plant species.[ citation needed ] The soil it grows in is a peat which is acidic, with a pH of 3.5 to 4.5. [6]
Buttongrass may form a symbiotic relationship with a species of burrowing crayfish Parastacoides tasmanicus , which aerates the soil with its burrows and in turn feeds on the rhizomes. [5]
It is also a food item of the critically endangered orange-bellied parrot, which breeds in buttongrass moorlands of southwestern Tasmania over the summer. [7]
Southwest National Park is an Australian national park located in the south-west of Tasmania, bounded by the Franklin-Gordon Wild Rivers National Park to the north and the Hartz Mountains National Park to the east. It is a part of a chain of national parks and state reserves that make up the Tasmanian Wilderness World Heritage Area. Covering an area of 6,183 km2 (2,387 sq mi), it is Tasmania's largest national park.
The orange-bellied parrot is a small parrot endemic to southern Australia, and one of only three species of parrot that migrate. It was described by John Latham in 1790. A small parrot around 20 cm (8 in) long, it exhibits sexual dimorphism. The adult male is distinguished by its bright grass-green upper parts, yellow underparts and orange belly patch. The adult female and juvenile are duller green in colour. All birds have a prominent two-toned blue frontal band and blue outer wing feathers.
Ambuchanania leucobryoides is the only species in the monotypic genus Ambuchanania. It is a Sphagnum-like moss endemic to Tasmania. Originally described as a species of Sphagnum, it is now a separate genus named after the original collector Alex M. Buchanan, (b.1944) an Australian botanist from the Tasmanian Herbarium in Hobart,. A. leucobryoides differs from the family Sphagnaceae in having elongate antheridia. It is entirely restricted to south-west Tasmania's Wilderness World Heritage Area where it occurs on white Precambrian quartzitic sand deposited by alluvial flows, and on margins of buttongrass sedge land. Species most commonly found in association with A. leucobryoides include: Leptocarpus tenax, Chordifex hookeri, and Actinotus suffocatus. Currently, A. leucobryoides is listed as rare under the Tasmanian Threatened Species Protection Act 1995.
Gahnia filum, the chaffy saw-sedge, is a tussock-forming perennial in the family Cyperaceae, endemic to Australia. It grows to between 60 and 110 cm in height.
Tussock grasses or bunch grasses are a group of grass species in the family Poaceae. They usually grow as singular plants in clumps, tufts, hummocks, or bunches, rather than forming a sod or lawn, in meadows, grasslands, and prairies. As perennial plants, most species live more than one season. Tussock grasses are often found as forage in pastures and ornamental grasses in gardens.
Anopterus glandulosus, commonly known as native laurel or Tasmanian laurel, is a species of shrub or small tree in the family Escalloniaceae. Endemic to south and southwestern Tasmania, A. glandulosus is widespread in the moist understoreys of Tasmanian temperate rainforests and wet sclerophyll forests from sea level to mountainous regions below 1,200 metres (3,937 ft) above sea level.
Dracophyllum milliganii is a species of angiosperm in the family Ericaceae and the sub-family Epacridoideae. It is a distinctive alpine shrub, endemic to western Tasmania.
Pteridium esculentum, commonly known as bracken fern, Austral bracken or simply bracken, is a species of the bracken genus native to a number of countries in the Southern Hemisphere. Esculentum means edible. First described as Pteris esculenta by German botanist Georg Forster in 1786, it gained its current binomial name in 1908. The Eora people of the Sydney region knew it as gurgi.
Gahnia grandis is a tussock-forming perennial plant found in southeastern mainland Australia and Tasmania.
Gleichenia dicarpa, commonly known as pouched coral fern or tangle fern, is a small fern of the family Gleicheniaceae found in eastern Australia, New Caledonia and New Zealand. It forms tangled thickets in wet places such as swamps and riverbanks.
The Melaleuca to Birchs Inlet Important Bird Area comprises a 2315 km2 section of coast and sub-coastal land in South West Tasmania. It stretches southward from the southern end of Birchs Inlet, encompasses Melaleuca and Port Davey, and extends to Louisa Bay on the coast facing the Maatsuyker Island group. The area is rugged, with extensive beaches and coastal plains rising to rocky mountains. It contains a mosaic of temperate rainforest, eucalypt forest, moorland and buttongrass plains.
Persoonia muelleri, commonly known as Mueller’s geebung, is a shrub endemic to Tasmania. It forms a shrub in open areas of wet forests in the west and northeast of the state. It is occasionally confused with P. gunnii though it has larger flowers and longer, straighter leaves.
Gahnia sieberiana, commonly known as the red-fruit saw-sedge, is a tussock-forming perennial plant in the family Cyperaceae, endemic to Australia. It is a widespread plant that favours damp sunny sites. Many insect larvae have been recorded feeding on the red-fruit saw-sedge. It may grow over 2 metres tall.
Dry sclerophyll forests occur throughout northern and eastern Tasmania. Characterised by the population of hard-leafed (sclerophyll) and often spiky, drought-adapted plants, dry sclerophyll forests are found in regions of where annual rainfall is below 1000mm.
Tasmania can be broadly divided into two distinct regions, eastern and western, that exhibit major differences in climate, geology and vegetation. This divide, termed Tyler’s Corridor, runs from just south of the northwestern corner, and continues south, cutting roughly down the center of the island. The vegetation changes occur principally due to variations in soil types, which are a result of the geological composition, and the vast difference in climate across the state. Generally, the west has a higher mean rainfall but poor acidic soil while the east has a lower mean rainfall but slightly more fertile soil. This results in a larger proportion of rainforest, moorland and wet sclerophyll vegetation dominating in the west and predominantly dry sclerophyll in the east.
Chordifex hookeri is commonly known as woolly buttonrush or cord-rush. It is a rush species of the genus Chordifex in the family Restionaceae. The species is endemic to Tasmania.
Xyris marginata, commonly known as alpine yellow eye, was first collected by German-Australian botanist Ferdinand von Mueller in 1875. Xyris marginata is a monocot in the family Xyridaceae which is endemic to King Island (Tasmania) and Tasmania, commonly growing in button grass moorlands, at altitudes of up to 1070 meters (3,510.5 ft) above sea level.
Monotoca glauca, known as goldy wood, is a heath family shrub endemic to Tasmania, Australia and is one of 17 described Monotoca species. It is a widespread and abundant understory species found on the margins of wet eucalypt forests and logged areas.
Helichrysum pumilum, commonly known as dwarf everlasting, is a rosette herb from the family Asteraceae. It is endemic to Tasmania, where it is commonly found in the West and Southwest of the island state. It is distinctive by its inflorescence, with the flower stalk being densely matted in fine white hairs and the daisy-like flower head having numerous pink or white ray floret-like bracts.
Anemone crassifolia, commonly known as mountain anemone, is a perennial herb in the family Ranunculaceae and is endemic to Tasmania, Australia. The species is common in high alpine moorlands of western and southern Tasmania at approximately 1000m. It is the only representative of the genus Anemone found in Australia.