|The large spreading Coast Wattle has precumbent lower branches running to 4 m and sustains little understorey. It provides shelter for small birds. Acacia longifolia has two subspecies one of which is local (indigenous), the other being introduced. The indigenous one is Acacia longifolia subsp. sophorae – or Coast Wattle, the introduced one is Acacia longifolia subsp. longifolia – or Sallow Wattle.
Furthermore, whilst Coast Wattle at the Bluff is considered indigenous, it has become semi-invasive in ‘modern’ times principally due to changes in fire management (i.e. fire repression) as well as its widespread and enthusiastic movement via the horticultural industry (i.e. plant nurseries and landscapers). It therefore occupies a niche similar to Leptospermum laevigatum in which its abundance along the coast and its distribuition away from the coast has increased considerably with European land management.