Legislative History of Cannabis Sativa L. and Hemp
"Legislative history suggests that Congress accepted the name Cannabis sativa L. for the hemp plant, believing it to be the common description within the scientific community.41 This categorization combined all marijuana-producing Cannabis plants.42 Therefore, any hemp plant capable of producing any amount of THC was classified as Cannabis sativa L. under the CSA.43"
Duppong, Thomas A., "Industrial Hemp: How the Classification of Industiral Hemp as Marijuana under the Controlled Substances Act Has Caused the Dream of Growing Industrial Hemp in North Dakota to Go up in Smoke," North Dakota Law Review (Grand Forks, ND: University of North Dakota School of Law, 2009) Vol. 85, No. 2, p. 407.