Indica Meaning: What the Word Tells You, and What It Doesn't

The meaning of indica is simple: it is Latin for "of India". In cannabis, though, it has two meanings. The first is botanical: a type of cannabis plant, first described from Indian specimens in the 1780s. The second is a label on products, widely read as a promise that the product will be relaxing or sedating.

The first meaning is real, if more tangled than most people think. The second is where the evidence runs out. This guide covers both, and what to look at instead if you are choosing or reviewing a prescribed product. It is general information, not individual medical advice.

Key takeaways

• Indica means "of India". It entered botany in 1785, when Cannabis indica was described as a separate species from the European hemp plant, Cannabis sativa.
• Today "indica" usually means a short, bushy plant with broad leaflets and dense flowers. Most of the plants called indica trace back to Afghanistan and its neighbours, not India.
• Many botanists now treat all cannabis as one species, Cannabis sativa, with indica as a subspecies or variety within it.
• Genetic and chemical studies have found that indica and sativa labels do not reliably match what is in a product, including its terpenes.
• What does shape the effect is the product's THC and CBD content, the dose, how you take it and how you respond. That is what your doctor prescribes on.

What does indica mean?

Carl Linnaeus named the cannabis plant Cannabis sativa in 1753. The plant he knew was European hemp, grown for fibre and seed, and "sativa" simply means cultivated.

In 1785 the French naturalist Jean-Baptiste Lamarck described a second species from plants collected in India and called it Cannabis indica, "cannabis of India". He separated it from European hemp on its form, and noted that in India it was used as an intoxicant, which the European fibre crop was not [1]. So from the start, "indica" carried a suggestion about effect as well as appearance.

What an indica plant looks like

In everyday use, "indica" describes a plant type rather than a place:

• Short and bushy, with closely spaced branches
• Broad, dark leaflets
• Dense, compact flowers
• A shorter flowering period than tall, narrow-leaved types

Plants like this come mainly from Afghanistan, Pakistan and the Hindu Kush mountains. That creates an odd tangle in the names. The botanist John McPartland has argued that the popular labels have drifted from their botanical meaning, so that the narrow-leaved plants now sold as "sativa" are closer to what Lamarck described as indica, and the broad-leaved plants sold as "indica" are an Afghan subtype of it [1].

Is indica a separate species?

Botanists have argued about it for more than two centuries. Some have treated sativa and indica as separate species, and some added a third, Cannabis ruderalis. Many now treat all cannabis as a single species, Cannabis sativa, with indica as a subspecies or variety within it [1].

For a patient, the argument matters less than what happened next. Decades of crossbreeding mean that almost every cannabis product available today is a hybrid of some kind. A product labelled indica is, at most, described as leaning that way.

What people mean when they call a product indica

On a product, "indica" is shorthand for an expected effect: relaxing, heavy in the body, better at night. "Sativa" is the opposite promise: uplifting, clear-headed, better in the day. Hybrids are said to sit in between.

This is the part the evidence does not support well. Several independent lines of research have tested whether the labels match what is actually in the plant:

• Genetics. A 2015 study of 81 drug-type cannabis samples found only a moderate match between their genetic makeup and their reported indica or sativa ancestry, and found that strain names often did not reflect a meaningful genetic identity [2].
• Genetics and chemistry together. A 2021 study of more than 100 samples found that indica- and sativa-labelled cannabis was genetically indistinct across the genome. The labels were linked to only a small number of terpenes [3].
• Chemistry at scale. A 2022 analysis of commercial cannabis across six US states found that products fall into distinct chemical types, but that the commercial labels did not consistently align with them [4].

The neurologist and cannabis researcher Ethan Russo made the same point bluntly in 2016: you cannot tell a plant's chemistry from its height, branching or leaf shape, and the indica and sativa labels should give way to descriptions of what the plant actually contains [5].

None of this means two products cannot feel different. They often do. It means the word on the label is not a reliable guide to which one will feel which way.

What shapes how a product feels

If the label is not the answer, these are the things that are.

THC and CBD content. THC is responsible for most of cannabis's intoxicating effects. CBD is not intoxicating and may change how THC is experienced. The amount of each, and the balance between them, matters far more than the plant type. Our guide to cannabinoids covers THC, CBD and the lesser-known ones. THC percentage is not a measure of how well a product works, which our article on THC strength and the entourage effect explains.

The dose. The same product can relax you at a low dose and make you anxious at a higher one. With a vaporiser, the temperature is part of the dose, as our article on terpenes and vaporiser temperature explains.

How you take it. Inhaled cannabis acts within minutes and wears off sooner. Oils and capsules taken by mouth act more slowly and last longer.

Terpenes, possibly. Terpenes are the aromatic compounds that give each cultivar its smell. The idea that they shape the effect of THC, known as the entourage effect, is a proposed interaction rather than an established fact, but it is the named hypothesis for why two products with the same THC can feel different. The indica and sativa labels do not reliably predict a product's terpenes either [3,4]. If you want to know a product's terpene profile, the certificate of analysis for the batch lists it, and you can ask your pharmacy for it. Our guides cover myrcene, linalool, caryophyllene, limonene and pinene.

You. Your tolerance, your other medicines, how you slept and what you ate all change how a dose feels.

What this means for a prescription

In Australia, medicinal cannabis is prescribed as a specific product, with its THC and CBD content stated. Many suppliers still describe flower as indica, sativa or hybrid, and it is fine to notice the label. It just should not be the reason you choose or change a product. Your doctor chooses a product on its full analysis, rather than on its name or its THC number.

If a product is not working for you, whether it is too sedating, not sedating enough, or causing side effects, tell your doctor what happened and when. That is far more useful than asking for "an indica", and it lets your doctor adjust the product, the dose or the form on the basis of what actually changed. Our guide to preparing for a follow-up appointment covers what to note down.

For the plant itself, how it grows and how hemp and medicinal cannabis differ, see our companion guide to the sativa plant.

Frequently asked questions

What does indica mean in Latin?

Indica means "of India" in Latin. Cannabis indica, the name given in 1785, means "cannabis of India", after the plants the species was first described from.

What does indica do to you?

The label itself does not do anything. How a product affects you depends mainly on its THC and CBD content, the dose, how you take it and your own response. Products sold as indica are expected to be relaxing, but research has found that the label does not reliably match the chemistry that would produce that effect.

Is indica high or stoned?

"High" and "stoned" are informal ways of describing the difference people expect between sativa and indica: a lively, mental effect versus a heavy, physical one. Differences between products can be real, but they come from what is in the product and the dose, not from the indica label.

Is indica better for sleep?

The label cannot tell you. Some patients do use medicinal cannabis to help with sleep, and the research on it is still developing. Whether a product helps depends on its contents and the dose, which is a conversation for your doctor. Our guide to medical cannabis and sleep hygiene covers the habits that matter alongside it.

Is indica stronger than sativa?

No. Strength comes from THC content, which varies between products regardless of the label. An indica can have more or less THC than a sativa.

What is better, sativa or indica?

Neither is better in general, and the labels are not a reliable guide to what a product will do. The useful question is which product suits your symptoms, and your doctor answers that on the product's contents rather than its label.

References

1. McPartland JM. Cannabis systematics at the levels of family, genus, and species. Cannabis Cannabinoid Res. 2018;3(1):203-212.
2. Sawler J, Stout JM, Gardner KM, et al. The genetic structure of marijuana and hemp. PLoS One. 2015;10(8):e0133292.
3. Watts S, McElroy M, Migicovsky Z, et al. Cannabis labelling is associated with genetic variation in terpene synthase genes. Nat Plants. 2021;7(10):1330-1334.
4. Smith CJ, Vergara D, Keegan B, Jikomes N. The phytochemical diversity of commercial Cannabis in the United States. PLoS One. 2022;17(5):e0267498.
5. Piomelli D, Russo EB. The Cannabis sativa versus Cannabis indica debate: an interview with Ethan Russo, MD. Cannabis Cannabinoid Res. 2016;1(1):44-46.