Daniel I. Axelrod

• Origin and relationships of the California flora
• Age and origin of Sonoran Desert vegetation
• Quaternary extinctions of large mammals
• A Miocene (10-12 Ma) Evergreen Laurel-Oak Forest from Carmel Valley, California
• Contributions to the Neogene paleobotany of central California
• History of the maritime closed-cone pines, Alta and Baja California
• Miocene floras from the Middlegate Basin, west-central Nevada
• New Pleistocene conifer records, coastal California
• Role of volcanism in climate and evolution
• The early Miocene Buffalo Canyon flora of western Nevada
• The Eocene Thunder Mountain flora of central Idaho
• The Late Oligocene Creede Flora, Colorado