#ThreatenedSpecies of the Week: Acacia Recurvata (Recurved Wattle)

Acacia recurvata (Recurved wattle) is listed as Endangered under the Commonwealth Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act) and Declared Rare Flora under the Wildlife Conservation Act 1950.

The main potential threats to Acacia recurvata include disease (Phytophthora), inappropriate fire regimes, insects, grazing, invasive weeds, spray drift, fragmentation and loss of habitat, and climate change.

Acacia recurvata is a dense, domed viscid shrub that can grow up to 2.5 m tall. Branchlets are glabrous or sparsely hairy with pale yellow hairs and are very resinous when young.  Phyllodes are dark green to dull grey green and are usually curved, with the upper margin more curved. Phyllodes can be 2.5 – 4 cm long and 4 – 8 mm wide, with an acute end.  They have 5 – 10 resinous nerves and can feel sticky (viscid).  The gland is inconspicuous and basal (at the base of the phyllode).

Inflorescences are simple in axillary pairs or more commonly, 1 or 2 headed rudimentary racemes.  Each inflorescence is 18 – 25 flowered, golden and resinous.  The fruit is a linear pod up to 6 cm long and 2 – 3 mm wide.  Seeds are longitudinal obloid, 3.5 – 4 mm long with a terminal aril. Flowering usually occurs in June – July, but they have been known to flower in May near Three Springs.

This species grows in sandy clay and hard granitic clay loam in Eucalyptus wandoo (wandoo), E. moderata or E. horistes woodland and/ or Melaleuca (e.g. M. adnata, M. marginata, M. concreta, M. longistaminea) shrubland on or near breakaways or granite and watercourses.

Acacia recurvata is endemic to Western Australia, where it is known from five small populations occurring over a range of approximately 60 km in the Coorow – Three Springs area, with one population within a conservation reserve. Acacia recurvata is thought to be an obligate seeder (plants are killed by fire and are dependent on seed for regeneration).

Written by Botanist, Jenny Borger from JB Botanical Consulting.

 

Information Source: Government of Australia, Department of Environment and Department of Parks and Wildlife Western Australia

Flora of Australia Volume 11B, Mimosaceae, Acacia Part 2.  ABRS/ CSIRO Publishing (2001)

Cowan R S & Maslin B. R. (1999) Acacia miscellany 17: miscellaneous new taxa and lectotypifications in Western Australia, mostly section Plurinerves (Leguminosae: Mimosoideae).  Nuytsia 12 (3): 432 – 433 

Conservation Advice 64825

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