|Mulga Acacia aneura woodland, Chambers Pillar, central Australia.|
|Acacia woodland, Murchison Falls NP, Uganda.|
For the record, African acacias are now either Vachellia or Senegalia. Both these genera are also significant in South America, along with smaller genera Acaciella and Mariosousa. A few species of Vachellia and Senegalia also occur in tropical Australia. Had the normal rules been followed, the rest of Australian acacias would now be Racosperma.
|acacias in northern Cameroon (above)|
and near Machu Picchu (Peru) below.
|Acacia spectabilis Goobang NP, central New South Wales|
|Acacia elata, coastal New South Wales|
|Acacia deanei Goobang NP, central New South Wales.|
|Acacia anceps Eyre Peninsula, South Australia|
|Acacia floribunda, south coast New South Wales|
|Acacia hakeoides Goobang NP central New South Wales|
|Acacia inaequalitaria Kata Tjuta NP, central Australia|
|Acacia monticola Ormiston Pound, west MacDonnell Ranges, central Australia|
|Acacia pycnantha Canberra.|
This is Australia's floral emblem, Golden Wattle
|Acacia retivenea Bladensberg NP, tropical central Queensland|
|Acacia spondylophylla Ormiston Pound, west MacDonnell Ranges, central Australia|
|Acacia triptera Goonoo NP central western New South Wales|
|Acacia (Vachellia) rorudiana, Santa Cruz, Galápagos|
|Acacia genistifolia Canberra|
|Acacia tetragonophylla south-west Queensland.|
This is known as Dead Finish, the logic being that if it dies of drought, there's no hope for anything else.
|Acacia paradoxa Canberra.|
In this one - Kangaroo Thorn - the spikes are stipules, growing from the base of the petiole.
|Acacia spinescens Lincoln NP South Australia.|
Here the branches themselves are spike-tipped. (Technically I suppose they could thus be thorns,
but that usually refers to smaller branches growing off the main ones.)
|Acacia mearnsii Canberra.|
Note the glands along the branch.
|Acacia rubida Redstem Wattle, Canberra.|