I found a book on Galapagos plants at Wikimedia Commons. It is, oddly enough, called
Galapagos Plants and the author is Klaus Schönitzer. I believe it was originally published by the Charles Darwin Foundation in 1975, so things have changed since then re botanical nomenclature & possibly with the distribution of the plants themselves?
Here is the page on acacias of the Galapago... apparently, there are four, none of which are endemic to the islands:
https://commons.wikimedia.org/...
Hope this is helpful, or at least interesting.
Cheers,
Virginia
