Acacia penninervis

This tree grows in eastern Australia.

It has dark grey bark. The bark has deep lines. It has pale yellow flowers. The flowers bloom all year.

Instead of leaves, it has thin parts. These parts stay green all year. They have small lines on them.

People once used the bark. They threw it into water. This helped them catch fish.

This tree is very useful. It helps the land stay healthy.

The mountain hickory wattle is a tree from eastern Australia. People also call it blackwood. This tree can grow as a shrub or a tree. It has dark grey bark. The bark has deep lines in it. The branches are smooth. Some branches have a fine white powder on them.

Most Acacia plants do not have true leaves. This tree has phyllodes. These are parts that act like leaves. They stay green all year. They are long and thin. They have a strong vein in the middle. They also have small veins on the sides. The tree makes pale yellow flowers. These flowers bloom all year long.

This tree grows in many Australian states. It also grows in New Zealand. Long ago, people in New South Wales used the bark. They threw it into waterholes. This helped them catch fish. The bark is not poisonous. It is just astringent. This means it has a sharp taste. The bark has 18% tannin. This is a natural substance found in the bark.

The mountain hickory wattle is a special plant from eastern Australia. People also call this plant blackwood. It can grow as a small shrub or a tall tree. The tree has dark grey bark with deep lines. Its branches are smooth and round. Sometimes, the branches have a fine white powder on them.

This plant does not have true leaves like many other trees. Instead, it has things called phyllodes. These phyllodes act just like leaves to help the plant. They stay green all year long. They are long and thin with a strong vein in the middle. Small veins also run along the edges.

Scientists have studied this plant for a long time. A botanist named Augustin Pyramus de Candolle first described it in 1825. Later, Leslie Pedley changed its scientific name in 1986. In 2006, the name was changed back to the Acacia genus. This shows how scientists keep learning about plants.

You can find this tree in several Australian places. It grows in New South Wales and Queensland. It is also in Victoria and the Australian Capital Territory. Some parts of the tree also grow in New Zealand. One variety grows near the coast in southern Queensland.

This tree has been useful to people for a long time. Aboriginal people in southern New South Wales used the bark. They would throw the bark into waterholes to catch fish. The bark is not poisonous to people. It is astringent, which means it has a sharp taste. The bark contains about 18% tannin.

Acacia penninervis is a perennial plant found in eastern Australia. It is known by several common names, including blackwood and mountain hickory wattle. This plant belongs to the subgenus Phyllodineae within the Acacia genus. It plays a role in environmental management in its native regions. Understanding this species helps us learn about Australian flora.

The physical structure of this plant is quite distinct. It grows as either a shrub or a tree. The plant often shows an erect or spreading growth habit. Its bark is usually dark grey in color. This bark features a surface that is finely or deeply fissured. The branchlets are glabrous, which means they are smooth. Occasionally, these branches have a fine white powdery coating.

One of the most interesting features is how the plant handles sunlight. Most Acacia species do not have true leaves. Instead, they possess structures called phyllodes. These phyllodes are evergreen and remain green all year. They have a narrowly oblanceolate or narrowly elliptic shape. This means they are long and thin. They are straight or slightly curved. Each phyllode has a prominent midvein and marginal veins. The veins are also finely penniveined.

Scientists have classified this plant in different ways over time. Augustin Pyramus de Candolle first formally described the species in 1825. He included it in his work titled Leguminosae, Prodromus Systematis Naturalis Regni Vegetabilis. In 1986, a scientist named Leslie Pedley reclassified it as Racosperma penninerve. However, the plant was transferred back to the Acacia genus in 2006. It has also been known by the synonym Acacia impressa.

There are two specific varieties of this plant. The first is Acacia penninervis var. penninervis. This variety grows across several Australian states. The second is Acacia penninervis var. longiracemosa. This variety is found in specific coastal districts. These districts include southern Queensland and northern New South Wales. The plant is native to the Australian Capital Territory, New South Wales, Queensland, and Victoria. It is also an introduced species in New Zealand. It can be found on both the North and South Islands.

Historically, the plant has been used in unique ways. An 1889 book called The Useful Native Plants of Australia mentions its uses. Aboriginal people in southern New South Wales used the bark and leaves. They would throw the bark into waterholes to catch fish. This caused fish to rise to the top for easy catching. The bark and leaves are not strictly poisonous. However, they are considered deleterious because of their astringency. This means they have a sharp or drying effect.

The chemical makeup of the tree is also noteworthy. The bark has a tannin content of approximately 18%. Tannin is a substance often found in many plants. This high concentration is a specific characteristic of the bark. These details help researchers understand the plant's chemistry. Such information is useful for both science and environmental management.