Themeda triandra | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Clade: | Commelinids |
Order: | Poales |
Family: | Poaceae |
Subfamily: | Panicoideae |
Genus: | Themeda |
Species: | T. triandra |
Binomial name | |
Themeda triandra | |
Synonyms [1] | |
List
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Themeda triandra is a species of C4 perennial tussock-forming grass widespread in Africa, Australia, Asia and the Pacific. In Australia it is commonly known as kangaroo grass [2] and in East Africa and South Africa it is known as red grass and red oat grass or as rooigras in Afrikaans. Kangaroo grass was formerly thought to be one of two species, and was named Themeda australis.
The plant has traditional uses as food and medicine in Africa and Australia. Indigenous Australians harvested it to make bread and string for fishing nets around 30,000 years ago. It was used as livestock feed in early colonial Australia, but this use was largely replaced by introduced plants. As of 2021 [update] there is a large government-funded project under way to investigate the possibility of growing kangaroo grass commercially in Australia for use as a regular food source for humans.
Themeda triandra is a grass which grows in dense tufts up to 1.5 metres (4 ft 11 in) tall and 0.5 metres (1 ft 8 in) wide. It flowers in summer, producing large red-brown spikelets on branched stems. [3] The leaves are 10–30 centimetres (3.9–11.8 in) in length and 1–8 millimetres (0.039–0.315 in) wide [4] but can exceed 10–50 centimetres (3.9–19.7 in) long and 2–5 millimetres (0.079–0.197 in) wide. [3] Its inflorescence is compounded, fasciculated, is 10–30 centimetres (3.9–11.8 in) long and composed of a single raceme. It pedicels are oblong and are 0.5 mm long while its lemma is 25–70 millimetres (0.98–2.76 in) long and is both apical and geniculate. The column of lemma's awn is hispidulous and twisted. [4]
Its leaves are a grey-green colour in winter, turning red-brown in summer. The blooms exude a strong perfume. [5]
Themeda triandra was first formally described in 1775 by Peter Forsskål who published the description in Flora Aegyptiaco-Arabica. [6] There are many synonyms of this species. [7] The specific epithet (triandra) is the feminine of the Botanical Latin adjective triandrus, meaning "with three stamens", [8] based on the Greek-derived combining forms tri-, three, and -andrus, male. [9]
Kangaroo grass was formerly thought to be one of two species, and was named Themeda australis. [5]
Themeda triandra is found across Asia, Africa, Australia, and the Pacific. In Australia, it is found in all of the states and territories. [3] It grows predominantly in grassland and open woodland communities. It is a significant species in temperate grasslands in Australia, a habitat considered to be endangered or threatened in various parts of the country. [3] It does not do well under heavy grazing pressure, but benefits from occasional fire. [10]
It tolerates a wide range of soils but is most common in moist microclimates such as roadsides and railway lines. [11]
T. triandra occurs on a wide variety of soils from sandy soils to heavy clays. There seems to be little association between abundance of T. triandra and a specific soil type. It is often common in areas where moisture collects and grazing is light, such as along roadsides or railway lines.
Kangaroo grass is a tufted perennial up to 1.5m tall, with tussock width up to 0.5m. The narrow leaves grow up to 0.5m long, and are green in summer changing to straw coloured in winter. The seed head is large, often red-brown and made up of clustered spikelets. [12]
The young growth is palatable to livestock. [13] [14] It serves as a food source for several avian species, including the long-tailed widowbird, and is occasionally used as an ornamental plant. [3]
Traditionally, in Uganda, the hollow stems of the grass are used as a thatch in hut construction, and for creating pulp for paper. [5] T. triandra seed has also been used as a famine food in Africa. [15] In West Africa, the root are used in the creation of a medicine used to treat dysmenorrhoea (painful periods). [16]
In Australia, it is sometimes used as an ornamental plant in rockeries, as a substitute for a lawn, and in cooking. It has also been found to be useful in treating horses for obesity, insulin resistance, and foot inflammation, because it is lower in carbohydrates such as sugar, starch, and fructans than introduced grasses. [5]
Before the colonisation of Australia, kangaroo grass used to be harvested by Aboriginal Australians, who used the leaves and stems for making string, the basis for fishing nets, as well as for food. The grains were harvested and ground into flour and porridge; the flour was used to make a traditional bread (later referred to as damper, although that term is mostly used for the bread made by non-Indigenous Australians), said to have a nutty flavour. Evidence has been found of this food production occurring around 30,000 years ago, with the grain considered to be a staple food and especially valuable in arid areas. [5]
However, in recent years kangaroo grass has been looked upon as a weed which is sometimes eaten by livestock. As of 2021 [update] , a four-year research project [17] supported by the Australian Government [18] is being undertaken by researcher Dylan Male, at La Trobe University in collaboration with the Dja Dja Wurrung Aboriginal Clans Corporation of central Victoria, investigating the possibility of developing it as a food crop. It is hoped that kangaroo grass would be able to be grown on a commercial scale and become a regular food source. They have found tussocks of the grass estimated to be over 50 years old, an possibly unique among Australian grasses. The plant has several advantages over currently farmed grains: [17]
However, at present the commercial viability of kangaroo grass is limited by low seed yields and poor knowledge of broadacre crop management. [20]
The project will draw heavily on the knowledge of the traditional owners of the land, and there will be ongoing communication with farmers and Landcare Australia groups. [18]
The project follows a smaller, crowdfunded project undertaken in 2017 by writer Bruce Pascoe on his own property in Gipsy Point, eastern Victoria, managed by volunteers, to develop several Indigenous Australian food crops, including murnong (yam daisy), kangaroo grass and native raspberries. [21]
In 2020 Pascoe established the not-for-profit Aboriginal social enterprise Black Duck Foods in Mallacoota, Victoria. Black Duck Foods conducts research into native foods and is currently working on a roadmap for the native grains industry. They have small quantities of kangaroo and spear grass flour for sale on their website. [22]
The University of Sydney has undertaken research into the nutritional value of kangaroo grass, finding that it is high in protein and minerals. [23]
A cereal is any grass cultivated for the edible components of its grain, which is composed of an endosperm, a germ, and a bran. Cereal grain crops are grown in greater quantities and provide more food energy worldwide than any other type of crop and are therefore staple crops. They include rice, wheat, rye, oats, barley, millet and maize. Edible grains from other plant families, such as buckwheat, quinoa and chia, are referred to as pseudocereals.
Forage is a plant material eaten by grazing livestock. Historically, the term forage has meant only plants eaten by the animals directly as pasture, crop residue, or immature cereal crops, but it is also used more loosely to include similar plants cut for fodder and carried to the animals, especially as hay or silage.
Fonio, also sometimes called findi or acha, is the term for two cultivated grasses in the genus Digitaria that are notable crops in parts of West Africa. They are millets with small grains.
A perennial plant or simply perennial is a plant that lives more than two years. The term is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also widely used to distinguish plants with little or no woody growth from trees and shrubs, which are also technically perennials.
Hierochloe odorata or Anthoxanthum nitens is an aromatic herb native to northern Eurasia and North America. It is considered sacred by many Indigenous peoples in Canada and the United States. It is used as a smudge, in herbal medicine and in the production of distilled beverages. It owes its distinctive sweet scent to the presence of coumarin.
Bush bread, or seedcakes, refers to the bread made by Aboriginal Australians by crushing seeds into a dough that is then baked. The bread is high in protein and carbohydrate, and forms part of a balanced traditional diet. It is also sometimes referred to as damper, although damper is more commonly used to describe the bread made by non-Indigenous people.
Themeda is a genus of plants in the grass family native to Asia, Africa, Australia, and Papuasia. There are about 18 to 26 species, many of which are native to Southeast Asia.
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.
Panicum decompositum, known by the common names native millet, native panic, Australian millet, papa grass, and umbrella grass, is a species of perennial grass native to the inland of Australia. It occurs in every mainland state. The seeds can be cultivated to produce flour typically used in Aboriginal bushfood. The species is also considered to have relatively high palatability by livestock, making it suitable for grazing pastures.
Paspalum scrobiculatum, commonly called Kodo millet or Koda millet, is an annual grain that is grown primarily in Nepal and also in India, Philippines, Indonesia, Vietnam, Thailand, and in West Africa from where it originated. It is grown as a minor crop in most of these areas, with the exception of the Deccan plateau in India where it is grown as a major food source. It is a very hardy crop that is drought tolerant and can survive on marginal soils where other crops may not survive, and can supply 450–900 kg of grain per hectare. Kodo millet has large potential to provide nourishing food to subsistence farmers in Africa and elsewhere.
A weed is a plant considered undesirable in a particular situation, growing where it is not wanted. The concept of weeds is particularly significant in agriculture, where the aim is growing crops or pastures of a single species, or a mixture of a few desired species. In such environments, other plant species are considered undesirable and therefore weeds. Besides, some weeds have undesirable characteristics making them a plant pest in most human settings.
Thinopyrum intermedium, known commonly as intermediate wheatgrass, is a sod-forming perennial grass in the Triticeae tribe of Pooideae native to Europe and Western Asia. It is part of a group of plants commonly called wheatgrasses because of the similarity of their seed heads or ears to common wheat. However, wheatgrasses generally are perennial, while wheat is an annual. It has gained the Royal Horticultural Society's Award of Garden Merit as an ornamental.
Microlaena stipoides, synonym Ehrharta stipoides, is a species of grass. It occurs naturally in all states of Australia as well as in New Zealand, Papua New Guinea, Indonesia and the Philippines. It has also been introduced into Hawaii and Reunion Island and has been reported as invasive in both. Common names used include weeping grass, weeping rice grass and weeping meadow grass.
Gahnia grandis is a tussock-forming perennial plant found in southeastern mainland Australia and Tasmania.
Themeda quadrivalvis is a species of grass known by the common names grader grass, habana grass, and kangaroo grass, not to be confused with Themeda triandra, which is also known as kangaroo grass. It is native to India, Nepal, and Malaysia. It can also be found in many other places as an introduced species and often a noxious weed. It occurs in the United States, New Caledonia, Fiji, Mauritius, Thailand, Indonesia, Papua New Guinea, China, the Middle East and tropical America. It is a troublesome exotic weed in Australia, especially in northern regions. It is also an agricultural weed in crops such as sugar cane and lucerne.
Poa labillardierei, also known as common tussock-grass, is a species of tussock grass that is endemic to Australia. It is found in southern and eastern Australia, including Tasmania. There are differing variations, Poa labillardierei var. acris Vickery and Poa labillardierei Steud. var. labillardierei.
Lomandra effusa is a perennial, dioecious, rhizomatous herb native to Australia. It is a perennial tussock with bluish green, large, arching leaves which are distinctive by the two toothed leaf tip. It has white, cream or pink fragrant flowers during the months of June to October.
Lomandra multiflora is a perennial, rhizomatous herb found in Australia. Lomandra multiflora is also commonly known as many-flowered mat rush, mat rush and many flowered mat-lily. Lomandra multiflora is a species that is native to Australia and can be found in New South Wales, Queensland, Victoria, South Australia, Northern Territory of Australia and also in Papua New Guinea. The mat rush is distributed widely in the region and common within its preferred growing conditions. The conservation status of Lomandra multiflora is considered not to be of concern and risk.
Eragrostis setifolia, commonly known as neverfail grass, is a species of perennial grass in the family Poaceae native to Australia, where it is widespread and common throughout the range lands and is commonly utilized as a pasture grass. According to IUCN classification it is listed as a least concern species throughout most of its range with the exception of Victoria where it is classified as vulnerable. It is capable of C4 photosynthesis.