Why are Acacias so named?

[David Deutsch]

In article <6fu2lf$3sp$1 at gnamma.connect.com.au>, "plantwest"
<nreese at nrg.com.au> wrote:

> the name acacia comes from the greek word for thorn - this is because
> African acacias have thorns on their trunks. I have not seen any Asutralian
> acacias with thorns though.


Hmmm I always thought the name came from the fact that they only
accasionally had thorns...

David Deutsch