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Acacia dealbata é uma espécie de árvore nativa da Austrália. Tem crescimento rápido, desenvolvendo-se rapidamente depois dos fogos. Não vive normalmente mais do que 30 a 40 anos, ao fim dos quais é substituída por outras. É conhecida vulgarmente como mimosa, no entanto não pertence ao género Mimosa. Devido à facilidade de propagação e resistência, é uma espécie invasora em muitos habitats.
Acacia dealbata (Silver Wattle) is a species of Acacia, native to southeastern Australia in New South Wales, Victoria, Tasmania, and the Australian Capital Territory.
It is a fast growing evergreen tree or shrub growing up to 30 m tall, typically a pioneer species after fire. The leaves are bipinnate, glaucous blue-green to silvery grey, 1–12 cm (occasionally to 17 cm) long and 1–11 cm broad, with 6–30 pairs of pinnae, each pinna divided into 10–68 pairs of leaflets; the leaflets are 0.7–6 mm long and 0.4–1 mm broad. The flowers are produced in large racemose inflorescences made up of numerous smaller globose bright yellow flowerheads of 13–42 individual flowers. The fruit is a flattened pod 2–11.5 cm long and 6–14 mm broad, containing several seeds. Trees generally do not live longer than 30 to 40 years, after which in the wild they are succeeded by other species where bushfires are excluded.
There are two subspecies:
- Acacia dealbata subsp. dealbata. Low to moderate altitudes. Tree to 30 m; leaves mostly 5–12 cm long.
- Acacia dealbata subsp. subalpina Tindale & Kodela. High altitudes in the Snowy Mountains. Shrub to 5 m (rarely 10 m) tall; leaves mostly 1.5–8.5 cm long.
Cultivation and uses
Acacia dealbata is widely cultivated as an ornamental plant in warm temperate regions of the world, and is naturalised in some areas, including southwestern Western Australia, southeastern South Australia, Norfolk Island, the Mediterranean region, and California.
It is a good furniture species, but with limited utilisation, mainly in craft furniture and turning. Beautiful, honey colour, often with distinctive figures like birdseye and tiger stripes. Medium weight (540–720 kg/m³). Glues satisfactorily, dresses well. Similar to Blackwood. It has been analyzed as containing less than 0.02% alkaloids.
Registos na Praia de Quiaios:
Acacia dealbata.kmz
Identificação:
Extraído de: O género "Acacia" na "Flora Iberica"
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