Author surveys the work of George W. Hendry and Margaret P. Kelly.
See, for example, Mark A. Blumer, “Geographical Aspects of Invasion: The Annual Bromes,” Middle States Geographer 39 (2006): 1–7. We can surmise from this work that the California coast and interior valleys looked a great deal differently at European contact than they do today, in terms of native or other vegetation. My thanks to Professor David Igler for directing me to the work of Blumer and others. It is also interesting that Hendry and Kelly's work found a home in the pages of a historical journal, where now this kind of scholarship is to be found in specialized ecological or plant biology journals.