I didn't think A. Acuminata grew close to Perth. Always thought you'd have to go past the hills sorta york, northam ways. Mind you, it seems I don't have the permissions to view the image for some reason.
Acacia acuminata (typical variant) occurs in south-west W.A., principally in the western part of the wheatbelt from near Mingenew S to Borden and Ravensthorpe, with outliers at Peak Charles, about 130 km due NE of Ravensthorpe and near Paynes Find. The western boundary of the geographic range is located close to Dandaragan, Toodyay and Williams; the eastern boundary is located close to Wongan Hills, Kellerberrin, Corrigin and Ongerup but in the absence of fruits and further field studies it is difficult to precisely map this boundary where it abuts the range of A. acuminata (narrow phyllode variant) . The typical variant most commonly occurs in brown loamy clay or sandy loam (pH5.5–7) in lower parts of the landscape (often near water courses) or in low hilly country, in low eucalypt Woodland. It has also been recorded from shallow white sand over laterite near Corrigin, from clays and from around granite outcrops. -
http://worldwidewattle.c...iesgallery/acuminata.phpmind you, some people grow them in their gardens and they might be propagating by themselves.