''Acacia penninervis'', commonly known as mountain hickory wattle, or blackwood, is a perennial shrub or tree is an ''Acacia'' belonging to subgenus ''Phyllodineae'',PlantNet
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Description

The shrub or tree typically grows to a height of and has an erect to spreading habit. It has finely or deeply fissured bark that is usually a dark grey colour. The glabrous branchlets are more or less terete and occasionally covered in a fine white powdery coating. Like most species of ''Acacia'' it has phyllodes rather than true leaves. The glabrous and evergreen phyllodes have a narrowly oblanceolate or narrowly elliptic shape and are straight to slightly curved with a length of and a width of with a prominent midvein and marginal veins and are finely penniveined. The plant blooms throughout the year producing pale yellow flowers.

Taxonomy

The species was first formally described by the botanist Augustin Pyramus de Candolle in 1825 as part of the work ''Leguminosae. Prodromus Systematis Naturalis Regni Vegetabilis''. It was reclassified as ''Racosperma penninerve'' by Leslie Pedley in 1986 then transferred back to genus ''Acacia'' in 2006. Other synonyms include; ''Acacia impressa'', ''Acacia penninervis'' var. ''impressa'' and ''Acacia impressa'' var. ''impressa''.

Varieties

* ''Acacia penninervis'' var. ''longiracemosa'' * ''Acacia penninervis'' var. ''penninervis''

Distribution

It occurs in the Australian states of the

Australian Capital Territory The Australian Capital Territory (commonly abbreviated as ACT), known as the Federal Capital Territory (FCT) until 1938, is a landlocked federal territory of Australia containing the national capital Canberra and some surrounding townships. ...

New South Wales ) , nickname = , image_map = New South Wales in Australia.svg , map_caption = Location of New South Wales in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , es ...

Queensland ) , nickname = Sunshine State , image_map = Queensland in Australia.svg , map_caption = Location of Queensland in Australia , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_ ...

and Victoria, and as an introduced species on New Zealand's North Island and South Island. The variety ''A. p.'' var. ''penninervis'' occurs in the same Australian states of the Australian Capital Territory, New South Wales, Queensland, and Victoria. The variety ''A. p.'' var. ''longiracemosa'' occurs in coastal districts of southern Queensland, and northern New South Wales.

Uses

The 1889 book 'The Useful Native Plants of Australia’ records that common names included "Hickory" and "Blackwood" and that "The bark (and, according to some, the leaves) of this tree was formerly used by the aboriginals ic.of southern New South Wales for catching fish. They would throw them into a waterhole when the fish would rise to the top and be easily caught. Neither the leaves nor bark contain strictly poisonous substances, but, like the other species of Acacia, they would be deleterious, owing to their astringency." Its uses include environmental management. The

tannin Tannins (or tannoids) are a class of astringent, polyphenolic biomolecules that bind to and precipitate proteins and various other organic compounds including amino acids and alkaloids. The term ''tannin'' (from Anglo-Norman ''tanner ...

content of the bark is approximately 18%.

References