On a Friday evening in January, a thousand people at the annual California Native Plant Society conference in San Jose settled down to a banquet and a keynote speech delivered by an environmental historian named Jared Farmer. His chosen topic was the eucalyptus tree and its role in California’s ecology and history. The address did not go well. Eucalyptus is not a native plant but a Victorian import from Australia. In the eyes of those gathered at the San Jose DoubleTree, it qualified as “invasive,” “exotic,” “alien” — all dirty words to this crowd, who were therefore convinced that the tree was dangerously combustible, unfriendly to birds, and excessively greedy in competing for water with honest native species.
In his speech, Farmer dutifully highlighted these ugly attributes, but also quoted a few more positive remarks made by others over the years. This was a reckless move. A reference to the tree as “indigenously Californian” elicited an abusive roar, as did an observation that without the aromatic import, the state would be like a “home without its mother.” Thereafter, the mild-mannered speaker was continually interrupted by boos, groans, and exasperated gasps. Only when he mentioned the longhorn beetle, a species imported (illegally) from Australia during the 1990s with the specific aim of killing the eucalyptus, did he earn a resounding cheer.