Botanical Classification vs Retail Labels
How botanists name and group cannabis, where the one-species versus two-species debate stands, and how those scientific names differ from shop labels like indica, sativa and ruderalis.
Content last updated . This page has not been medically reviewed.
Two naming systems exist side by side. One is botanical taxonomy: formal Latin names, rules about which name has priority, and evidence from anatomy, chemistry and DNA. The other is the retail system of labels used on packaging. They use some of the same words but do not mean the same thing. Evidence labels used here: mixed, insufficient evidence, marketing claim. This is education only.
The plant family and genus
Cannabis belongs to the family Cannabaceae, which also includes Humulus and eight genera formerly placed in a different family. A 2018 review of cannabis systematics reports that this grouping goes back about 250 years. [1] The same review reports fossil pollen pointing to a center of origin in the northeastern Tibetan Plateau, and dispersal to Europe by 1.8 to 1.2 million years ago. [1]One species, two species, or more?
There is no single settled answer, and that is the honest state of the science.- Two species. A 2004 chemotaxonomic study of 157 accessions supported a two-species concept, C. sativa and C. indica. [2]
- One species, subspecies. The 2018 review favors C. sativa subsp. sativa and C. sativa subsp. indica, based partly on DNA barcodes. It notes that Small's model adheres closest to Lamarck's and Linnaeus's original descriptions, with C. indica as a subspecies. [1]
- Genetics of cultivated plants. A 2015 study of 14,031 SNPs (single-letter DNA variants) in 81 marijuana and 43 hemp samples found marijuana and hemp differ genome-wide, and that hemp is genetically more similar to C. indica-type marijuana than to C. sativa strains. [3]
Ruderalis is a third name you may see. The 2018 review notes that a Vavilov name (var. spontanea) has priority over Janischevsky's ruderalis, and that Janischevsky himself leaned toward calling it a variety rather than a species. [1]
Why the botanical names and the retail words diverge
The retail words came from a chain of reassignments. Field botanists in the 18th to 20th centuries applied the names sativa and indica to their collections "rather capriciously," according to the 2018 review, and herbarium records show no pattern tying either name to a particular region. [1] The review concludes that today's "Sativa" and "Indica" misalign with the formal names, and that writing them in quotation marks (retail) versus italics (botanical) signals different meanings. [1]| Botanical classification | Retail labels | |
|---|---|---|
| Purpose | Name and group plants by shared ancestry and traits | Describe a product category to buyers |
| Evidence | Anatomy, DNA, chemistry, herbarium records | Seller, breeder or database choice; no common standard |
| Stability | Debated but documented and revised in journals | Varies by seller; the same cultivar can be labeled differently |
| Predicts effects? | Not designed to | Marketed as predicting effects; insufficient evidence |
What the testing shows about retail labels
A study of 30 cultivars found no clear genetic support for Sativa, Indica and Hybrid types as described in online databases. [4] A chemistry study of 89,923 samples found labels do not consistently align with the measured cannabinoids and terpenes. [5] For effects, see why labels do not reliably predict effects.Legal and regulatory use of the species name
Laws often use "Cannabis sativa L." as the plant's formal name, regardless of retail labels. For example, the US hemp definition (read 2026-10-22) applies to the plant Cannabis sativa L. with delta-9 THC of not more than 0.3 percent on a dry weight basis. [6] This is not legal advice, and laws change. More in hemp legal definitions.Safety note
A botanical or retail name does not tell you how a product will affect you or whether it is safe with your medicines. See cannabis and CBD medicine interactions and talking with a health professional.Frequently asked questions
Are indica and sativa different species?
Experts disagree. A 2004 study supports two species, while a 2018 review prefers one species with two subspecies. [2][1]
What is ruderalis?
A third name used in cannabis taxonomy. The 2018 review discusses whether it deserves species rank, and notes that its author leaned toward calling it a variety. [1]
Do botanists use the words indica and sativa the way shops do?
Not in the same sense. The 2018 review says the vernacular "Sativa" and "Indica" misalign with the formal names. [1]
What did genetics tell us about hemp and drug types?
Marijuana and hemp differ genome-wide, not just in genes for THC production. [3]
References
- McPartland JM. Cannabis Systematics at the Levels of Family, Genus, and Species. Cannabis and Cannabinoid Research. 2018;3(1):203-212 (full text at PMC6225593). Read 2026-10-22.
- Hillig KW, Mahlberg PG. A chemotaxonomic analysis of cannabinoid variation in Cannabis (Cannabaceae). American Journal of Botany. 2004;91(6):966-975. Read 2026-10-22.
- Sawler J, et al. The Genetic Structure of Marijuana and Hemp. PLoS One. 2015;10(8):e0133292. Read 2026-10-22.
- Schwabe AL, McGlaughlin ME. Genetic tools weed out misconceptions of strain reliability in Cannabis sativa: implications for a budding industry. Journal of Cannabis Research. 2019;1(1):3. Read 2026-10-22.
- Smith CJ, Vergara D, Keegan B, Jikomes N. The phytochemical diversity of commercial Cannabis in the United States. PLoS One. 2022;17(5):e0267498 (full text at PMC9119530). Read 2026-10-22.
- Legal Information Institute (Cornell Law School). 7 U.S. Code section 1639o, Definitions (definition of hemp, with the Public Law 119-37 amendment notice). Not legal advice; laws change. Read 2026-10-22.