The Baja California Pacific Islands (north of 28 degrees latitude) are each very different in their flora and fauna. All but Guadalupe Island (which is oceanic) are continental shelf islands, believed to have been connected to the mainland during the previous 1 million years. They range in size from 0.2 to 134 square miles in area (0.4 to 348 km2) and Guadalupe sits furthest from the mainland at 157 nautical miles offshore.
View Current Floristic Knowledge Table

(Plant checklists will be available for download soon)

The Research

Research on the Baja California Pacific Islands featured here began in the 1800s with visitors such as Thomas Streets (1875), soon followed by Charles Pond and Edward Palmer (1888-1889) and Alfred Anthony and Townsend Brandegee (1900) all of whom collected specimens.  Since then, a series of botanists have collected significantly on the islands, including Reid Moran, Steve Juank, Ralph Philbrick, Michael Benedict, Jon Rebman, and Sula Vanderplank.  Junak and Philbrick published several island floras and Tom Oberbauer published on the floras of Los Coronados, Cedros and Guadalupe (see associated literature).


It is a particularly exciting time to study the flora of these islands, because thanks to the amazing efforts of the Island Conservation group GECI (Grupo de Ecología y Conservación de Islas) most non-native mammals have now been eradicated.  Non-native animals had been ravishing these landscapes since the 1800’s and the recovery of the island plants in recent years has been nothing short of remarkable.

Our Work

In 2014, Sarah Ratay, Sula Vanderplank and Ben Wilder published a paper ‘Island specialists: shared flora of the Alta and Baja California Pacific Islands’ which included updated checklists with taxonomy updated and synonyms removed (available HERE).
The expeditions of 2015 and 2016 have worked to update these checklists and the numbers present here represent the latest findings.