Coastal Chaparral is found at the lone U.S. site for birdbush, with both Xylococcus bicolor and Adenostoma fasciculatum present. The U.S. Border Patrol activities, including their preference for the clearance of brush near the border fence, threaten this population.
Fire is the only other endangerment factor in evidence.
All sites should be protected. Copyright May 1994 Craig H. Reiser.