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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.
Foliage and fruiting panicle of Cordyline obtecta. C. obtecta is a cabbage tree up to 10 metres (33 ft) tall (generally much less), with a stout trunk 20–30 centimetres (7.9–11.8 in) in diameter. It has spreading branches covered with densely clustered stiff leaves that appear in tufts at the tips of the branches.
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.
Too much sunlight is another common problem that can lead to brown tips. “Browning at the edges and tips is a sign that you might need to protect your plants from sun damage,” says Borisevich ...
The most obvious symptom of this disease is the yellowing of leaves before they drop in the early spring. Infected leaves are filled with numerous black lesions that cover an obvious portion of the leaf. [5] These lesions first appear as small purple spots which turn red to brown and then black.
As the leaves develop, they become increasingly distorted, and ultimately thick and rubbery compared to normal leaves. The color of the leaves changes from the normal green to red and purple, until a whitish bloom covers each leaf. Finally, the dead leaf may dry and turn black before it is cast off. Changes in the bark are less noticeable, if ...
Overwatering and underwatering are, hands down, the most common causes of peace lily leaves turning yellow, and these two issues can cause leaf drop and wilting, too.
Tī ngahere is a sparingly-branched cabbage tree up to 4 metres (13 ft) tall. The leaves are lanceolate (somewhat paddle-shaped), up to 2 metres (6 ft 7 in)long and from 40–80 millimetres (1.6–3.1 in) wide. The leaves are broad in the mid portion and droop from there. A prominent flat midrib runs the whole length of the leaf.