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Xanthorrhoea (/ z æ n θ oʊ ˈ r iː ə / [2]) is a genus of about 30 species of succulent flowering plants in the family Asphodelaceae.They are endemic to Australia. Common names for the plants include grasstree, grass gum-tree (for resin-yielding species), kangaroo tail, balga (Western Australia), yakka (South Australia), yamina (), and black boy (or "blackboy").
Underground farming is the practice of cultivating food underground. Underground farming is usually done using hydroponics , aeroponics or air-dynaponics systems or container gardens . Light is generally provided by means of growth lamps [ 1 ] or daylighting systems (as light tubes ).
Xanthorrhoea australis, the grass tree or austral grasstree, [1] is an Australian plant. It is the most commonly seen species of the genus Xanthorrhoea. Its trunk can grow up to several metres tall and is often branched. In certain Aboriginal languages, it is called bukkup, baggup or kawee. [1]
It is an herbaceous perennial grass, growing to 0.8–2 m (3–7 ft) tall, rarely 4 m (13 ft), forming dense clumps from an underground rhizome. The leaves are 18–75 cm (7–30 in) tall and 0.3–2 cm broad. The flowers are purplish, held above the foliage.
Unlike most grasses, which form horizontally, spreading mat-like root systems, vetiver's roots grow downward 2–4 m (7–13 ft) in depth. [6] The vetiver bunch grass has a gregarious habit and grows in tufts. Shoots growing from the underground crown make the plant frost and wildfire resistant, and allow it to survive heavy grazing pressure.
These rhizomes can grow laterally by 2 metres (6 ft 7 in) in six months. One clump can produce 100 new shoots annually. [4] The rhizomes tolerate submersion in sea water and can break off and float in the currents to establish the grass at new sites. [5] The leaves are up to 1 metre (3 ft 3 in) long and sharply pointed.
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Spotted knapweed can alter which plant species a certain AM fungus prefers to connect to, changing the structure of the network so that the invasive plant shares a network with its target. [33] These and other studies provide evidence that mycorrhizal networks can facilitate the effects on plant behavior caused by allelochemicals.