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Cordyline australis, commonly known as the cabbage tree, [3] or by its Māori name of tī or tī kōuka, is a widely branched monocot tree endemic to New Zealand. It grows up to 20 metres (66 feet) tall [ 4 ] with a stout trunk and sword-like leaves, which are clustered at the tips of the branches and can be up to 1 metre (3 feet 3 inches) long.
Old man's beard smothering a Cordyline australis (cabbage tree) on the Port Hills in Christchurch. Old man's beard (Clematis vitalba) is an invasive plant in New Zealand that affects indigenous biodiversity. It is declared an unwanted organism under the Biosecurity Act 1993 which means it cannot be sold, distributed or propagated.
Cordyline is a genus of about 24 species of woody monocotyledonous flowering plants in family Asparagaceae, subfamily Lomandroideae. The subfamily has previously been treated as a separate family Laxmanniaceae, [ 2 ] or Lomandraceae.
Fresh seed takes readily, and cuttings taken from the stems and trunk and shoots root quickly. It is rarer in cultivation than C. australis but is available from many nurseries and garden centres, often as a purple-leaved cultivar. Useful for steep slopes or poorly drained situations. The plant is hardy in USDA zones 10a and 11.
Mealybugs have a host plant Cordyline australis (Asparagaceae). They live at the base of the leaves, usually around the debris of the previous leaves. These cabbage trees are abundant all around New Zealand, which suggests that mealybugs are also abundant around all around New Zealand
In particular the popular annual house or ornamental plant, sold under the common name "Spikes" or "Dracaena Spikes", which is an immature form of C. australis, is incorrectly sold as Cordyline indivisa or Dracaena indivisa. (Dracaena is a closely related genus from which some species have been reclassified as Cordyline.) [3]
A new 20-year research project has catalogued changes in British and Irish flora since the mid-20th century.
See: List of endangered plants, List of critically endangered plants. Vulnerable, Endangered, and Critically Endangered species are collectively referred to as threatened species by the IUCN. Additionally 1674 plant species (7.6% of those evaluated) are listed as Data Deficient , meaning there is insufficient information for a full assessment ...