Acacia decurrens

Scientific nameAcacia decurrens
Fabaceae; Subfamily: Mimosaceae
English: acacia bark, early black wattle, green wattle, Sydney wattle, tan wattle
Indonesia: wartel
Evergreen tree with no thorns/spines [5–10 (–15) m tall]; no visible hairs; branches prominently angled with wings or ridges that emanate from the leaf bases.
Bark: Olive-green turning grey, smooth to deeply fissured.
Leaves: Bright green, twice-divided, feathery; leaflets slender (6–15 mm long), a single raised gland occurs at the junction of each pair of leaf branchlets.
Flowers: Bright yellow, rounded clusters arranged into larger, showy, elongated compound clusters.
Fruits: Pods (several-seeded dry fruits that split open at maturity), green turning dark brown as they mature, elongated, hairless, slightly flattened (2–10 cm long), containing about 11 black seeds.
Southeast Australia
Fuelwood, building materials, timber, tannins, pulp, soil conservation, windbreaks, shelter, shade and ornament.
Roadsides, disturbed land, wasteland, urban open space, grasslands, savannah, forest edges/gaps and riparian vegetation.
The accumulation of dead/rotting foliage forms a thick ground cover which, over time, eliminates the growth and establishment of other vegetation (Ruskin, 1983). When it forms dense thickets along waterways it reduces water flow and can contribute to flooding (Hill et al., 2000) and streambank erosion. It has a significant impact on water runoff, and because it fixes nitrogen, it alters soil nutrient cycling. Its pollen is reported to be allergenic.
Witt, Arne. 2017. Guide to the Naturalized and Invasive Plants of Southeast Asia. CAB International. Retrieved from on 9 October 2018
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Last updated on 02/13/2019 02:19