| 1954. Lewis, Harlan and Carl Epling. A Taxonomic Study of Californian Delphiniums. Brittonia (1): 1-22. | Google Scholar |
| 1954. Lewis, Harlan and Frank C. Vasek. CLARKIA EXILIS, A NEW CALIFORNIAN SPECIES. Madroño (7): 211-213. | Google Scholar |
| 1955. Thompson, Henry J. and Harlan Lewis. CHROMOSOME NUMBERS IN MENTZELIA (LOASACEAE). Madroño (3): 102-107. | Google Scholar |
| 1957. Lewis, Harlan. Genetics and Cytology in Relation to Taxonomy. Taxon (2): 42-46. | Google Scholar |
| 1958. Lewis, Harlan and Peter H. Raven. Clarkia franciscana, a New Species from Central California. Brittonia (1): 7-13. | Google Scholar |
| 1959. Raven, Peter H. and Harlan Lewis. The Relationship of Clarkias from Two Continents. Brittonia (4): 193-205. | Google Scholar |
| 1960. Lewis, Harlan. Chromosome Numbers and Phylogeny of Trichostema. Brittonia (2): 93-97. | Google Scholar |
| 1962. Kurabayashi, Masataka, Harlan Lewis and Peter H. Raven. A Comparative Study of Mitosis in the Onagraceae. American Journal of Botany (9): 1003-1026. | Google Scholar |
| 1962. Kurabayashi, Masataka, Harlan Lewis and Peter H. Raven. A COMPARATIVE STUDY OF MITOSIS IN THE ONAGRACEAE. American Journal of Botany (9): 1003-1026. | Google Scholar |
| 1964. Lewis, Harlan and Jerzy Szweykowski. The Genus Gayophytum (Onagraceae). Brittonia (4): 343-391. | Google Scholar |
| 1967. Lewis, Harlan. The Taxonomic Significance of Autopolyploidy. Taxon (4): 267-271. | Google Scholar |
| 1967. Emboden, William A. and Harlan Lewis. Terpenes as Taxonomic Characters in Salvia Section Audibertia. Brittonia (2): 152-160. | Google Scholar |
| 1969. Lewis, Harlan. Speciation. Taxon (1): 21-25. | Google Scholar |
| 1971. Small, E., I. J. Bassett, C. W. Crompton and H. Lewis. Pollen Phylogeny in Clarkia. Taxon (5/6): 739-746. | Google Scholar |
| 1978. Lewis, Harlan and Jerzy Rzedowski. The Genus Trichostema (Labiatae) in Mexico. MadroƱo (3): 151-154. | Google Scholar |
| 1992. Lewis, Harlan and Peter H. Raven. NEW COMBINATIONS IN THE GENUS CLARKIA (ONAGRACEAE). Madroño (3): 163-169. | Google Scholar |
| 2006. Lewis, Harlan. TRICHOSTEMA RUYGTII (LAMIACEAE): A NEW SPECIES FROM NAPA COUNTY, CALIFORNIA. Madroño (3): 282-287. | Google Scholar |