1. The occurrence of Cedrela in the Miocene of Western America;Arnold;Amer. Midl. Nat.,1936a
2. Some fossil species of Mahonia from the Tertiary of eastern and southeastern Oregon;Arnold;Contrib. Univ. Mich. Mus. Paleo.,1936b
3. Observations on the fossil flora of eastern and southeastern Oregon;Arnold;I. Contrib. Univ. Mich. Mus. Paleo.,1937
4. A Miocene flora from the western border of the Mohave Desert;Axelrod;Carnegie Inst. Wash. Publ.,1939
5. The Sonoma flora;Axelrod;Carnegie Inst. Wash. Publ.,1944