Carl Clawson Epling (15 April 1894 – 17 November 1968) was an American botanist and taxonomist. He is best known for being the major authority on the Lamiaceae (mint family) of the Americas from the 1920s to the 1960s. In his later years he also developed an interest in genetics. 
Epling obtained his B.A. from the College of Agriculture at University of California, Berkeley in 1921. He received his M.A. in 1923 and Ph.D. in 1924 from Washington University, with a dissertation on the genus Monardella. 
Epling's first academic position was as an instructor in botany at Oregon State College in 1921-22.  He became staff member at the University of California, Los Angeles in 1924.  In 1941, he was made a faculty research lecturer at UCLA.  He was honored by UCLA with an honorary doctor of laws degree in 1963.  He retired from UCLA in 1965. 
From 1944 until his retirement, he held the title of systematist in the University of California Division of Agriculture and Natural Resources Agricultural Experiment Station. 
He was also a researcher in population genetics. At the time of his death he was studying the flora of Ecuadorian rain forests. Carl Clawson Epling died in Santa Monica, in 1968. 
Epling published more than one hundred scientific works ranging from monographs to contributions to local floras, and described numerous genera and species new to science—including the well known psychoactive Salvia divinorum. 
In 2012, the genus name of Eplingiella was named in his honour.
Epling was born in Waverly, Illinois, son of Allen Judson Epling and Inez S. Epling. He was married to Ruth Persons Epling, they had 2 children; Elizabeth and anthropologist Philip Judson Epling (1931-1973).
- ^ a b c d e University of California: In Memoriam − Carl Clawson Epling, Botany: UC Los Angeles; December 1970.
- ^ a b c d e f g Find A Grave Memorial.com: Dr Carl Clawson Epling (1894-1968)
- ^ International Plant Names Index. Epling.
- ^ "Eplingiella Harley & J.F.B.Pastore | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 26 May 2021.
- ^ Burkhardt, Lotte (2018). Verzeichnis eponymischer Pflanzennamen – Erweiterte Edition [Index of Eponymic Plant Names – Extended Edition] (pdf) (in German). Berlin: Botanic Garden and Botanical Museum, Freie Universität Berlin. doi:10.3372/epolist2018. ISBN 978-3-946292-26-5. S2CID 187926901. Retrieved 1 January 2021.
- Mathias, M.E. (1970). Carl Clawson Epling (1894–1968). Taxon 19: 88–92.
- WKU.edu: Carl Epling - Chrono-Biographical Sketches
- American botanical writers
- American taxonomists
- 1894 births
- 1968 deaths
- American geneticists
- Population geneticists
- Botanists active in California
- University of California, Los Angeles faculty
- Oregon State University faculty
- University of California, Berkeley alumni
- Washington University in St. Louis alumni
- Scientists from California
- Writers from Los Angeles
- 20th-century American botanists
- 20th-century American non-fiction writers