Hemp vs Indian vs Ruderalis: How to Distinguish Them (Table)

Three names, one type, and a lot of misunderstandings. Cannabis sativa, Cannabis indica, and Cannabis ruderalis describe plants with different growth habits and different ways of transitioning to flowering. However, botany and genomics do not speak with one voice here. Sequencing of 110 cannabis lines from around the world indicated a single gene pool from the early Neolithic in East Asia, from which today’s fiber and intoxicating varieties are derived (Ren et al., Science Advances, 2021). The label “indica” or “sativa” on a product says less than its sound suggests. Below you will find a table of morphological characteristics and an answer to the question of what legal hemp flower available in Poland is really made from. The prices mentioned in the article come from the store API as of August 8, 2026.

KEY INFORMATION
• Sequencing of 110 cannabis lines indicates a single gene pool in East Asia (Ren et al., Science Advances, 2021).
• Cannabis ruderalis introduces autoflowering: it flowers based on the age of the plant, not the length of the day.
• The ratio of CBD to THC is determined by a single locus, not the species name (de Meijer et al., Genetics, 2003).
• The 0.3% THC threshold in the EU results from regulation 2021/2115, not from the repealed 1307/2013.

What are hemp and what distinguishes them?

Hemp is Cannabis sativa L., a species described by Carl Linnaeus in 1753 in the work Species Plantarum. The plant grows tall, from 1 to 5 meters, has narrow leaf segments, and a light color. It only transitions to flowering when the day shortens. All varieties permitted for cultivation in the European Union come from this species.

Analysis of the genomes of 110 lines from around the world placed the first domestication in the early Neolithic in East Asia and showed that today’s fiber and intoxicating varieties derive from a single gene pool, currently represented by wild plants and landrace in China (Ren et al., Science Advances, 2021). The common image of two independent developmental lines is difficult to reconcile with this.

The cultivation cycle is the longest of the three forms discussed. Photoperiodic varieties need 10 to 16 weeks of flowering after the day is shortened to less than 12 hours, which can be a problem in the Polish climate: the plant may not finish before the frost. Fiber and oil varieties manage well here because their harvest occurs earlier.

The seeds of this species are a separate product category. A review of the nutritional value of industrial hemp seeds describes them as a source of plant protein and unsaturated fatty acids, and the distinction between industrial and intoxicating hemp is reduced to the THC threshold in dry mass (Farinon et al., Nutrients, 2020).

What are Indian hemp and where do their characteristics come from?

Indian hemp is Cannabis indica Lam., described by Jean-Baptiste Lamarck in 1785 based on material brought from India. The plant is low, from 0.5 to 2 meters, bushy, with wide leaf segments. These characteristics are associated with its mountainous origin from the Hindu Kush region, where the growing season is short and sunlight is strong.

The most striking difference is the density of glandular hairs, or trichomes. This is where the biosynthesis and accumulation of phytocannabinoids occur, so a richer layer of resin simply means more space for these compounds to form (Xie et al., Horticulture Research, 2023). Hence the traditional use of this form as a raw material for hashish production in Afghanistan, Morocco, and Nepal.

Flowering lasts shorter than in hemp, usually from 8 to 9 weeks, and also depends on day length. The popular division into the calming effects of indica and the stimulating effects of sativa comes from the practice of breeders, not from research on the plant. We return to it in the section on taxonomy, as this division most often appears on product labels.

Why has ruderalis changed cannabis cultivation?

Cannabis ruderalis is a wild-growing form from Central Asia and Eastern Europe, described by Dmitry Janischewsky in 1924. It grows to 30 to 60 centimeters, has a thin stem, and produces little resin. Its value lies elsewhere: it flowers after a certain number of days from germination, regardless of day length.

This trait is called autoflowering. The plant usually transitions to flowering after 3 or 4 weeks from germination, as waiting for a light signal would be risky in an area with a short and unpredictable growing season. Crossing ruderalis with a photoperiodic form transfers this trait to the offspring, allowing the entire cultivation cycle to close in 8 to 10 weeks without light control.

The genetic basis of this trait is still not fully understood. A review of studies on flowering time in Cannabis sativa states that loci responsible for phenology are less well described than the biosynthetic pathways of phytocannabinoids, and the lack of a coherent reference genome has long hindered the comparison of results between teams (Steel et al., Frontiers in Plant Science, 2023). Autoflowering is therefore a trait practically tamed by breeders, but not fully explained by genetics.

How to distinguish the three cannabis taxa in the field?

The simplest indicators are height, width of leaf segments, and what triggers flowering. The table below compares them side by side. A caveat is important: the boundaries are fluid, and most cultivated plants are hybrids drawing from at least two forms, so morphologically pure specimens are mainly found among landrace.

In practice, the first thing to look at is the proportions: the ratio of the height of the bush to its width and the width of a single leaf segment. The number of segments itself says little, as it changes with the age of the plant. With ruderalis, the decisive factor may only be the flowering time, as the growth habit of a young specimen can easily be confused with an undernourished indica.

Are cannabis one species or three?

There is no answer recognized by all botanists, and the dispute has been ongoing for half a century. In short: the difference lies in whether you consider morphological traits as a species boundary or just as a variation within a single variable population. Three positions operate in circulation, each with different practical consequences.

• One species. Ernest Small and Arthur Cronquist proposed in 1976 a framework in which all cannabis belongs to Cannabis sativa L. with two subspecies, and ruderalis is a variant within this system.
• Three species. Loran Anderson and some taxonomists treated sativa, indica, and ruderalis as separate species. This view has become entrenched in the jargon of breeders.
• Chemical classification. Instead of asking about the species, one asks about the cannabinoid and terpene profile of a specific variety.

The third position now has the strongest support among researchers. Ethan Russo called the division into sativa and indica useless and urged the scientific community and the public to abandon this nomenclature in favor of reliable biochemical designations of cannabinoid and terpene profiles (Piomelli and Russo, Cannabis and Cannabinoid Research, 2016). The argument is simple: morphology does not predict chemical composition.

We have noticed that our own catalog has already gone in this direction. In the names of 34 items in the flower category, the words “indica” or “sativa” do not appear even once. Instead, there are variety names: Santhica, Northwest, Midwest, Heaven. This is exactly the direction that Russo advocates.

What determines the content of CBD and THC if not the species?

A single locus in the genome determines it. Crossbreeding plants with a pure CBD profile with plants with a pure THC profile always produced an F1 generation with a mixed profile, and in the F2 generation, the three profiles segregated in a 1:2:1 ratio (de Meijer et al., Genetics, 2003). This distribution indicates a single locus with two co-dominant alleles.

The practical conclusion is that the ratio of CBD to THC is inherited independently of the plant’s growth habit. A tall, slender sativa can have a lot of THC or almost none, while a short indica can be a CBD-dominant variety. The species name does not carry this information, as it pertains to a completely different trait.

This is confirmed by genotyping of 81 intoxicating varieties and 43 fiber varieties on 14,031 single nucleotide polymorphisms. The authors found a moderate correlation between the genetic structure of the varieties and the declared origin from sativa or indica, but also directly stated that the names of the varieties often do not correspond to any meaningful genetic identity (Sawler et al., PLOS ONE, 2015). Therefore, the label on the jar is a weak indicator, while the results of a batch analysis are strong.

What does this mean for legal hemp flower in Poland?

Legal flower comes entirely from hemp. The Polish Act on Counteracting Drug Addiction defines fiber hemp as Cannabis sativa L., in which the sum of delta-9-tetrahydrocannabinol and tetrahydrocannabinolic acid in the flower tops does not exceed 0.3% in terms of dry mass (Dz.U. 2023 poz. 1939).

The same threshold applies in EU law, although it reached it by a roundabout way. Regulation 1307/2013 allowed for subsidies for hemp with THC content up to 0.2%. Since 2023, it has been replaced by regulation 2021/2115, which raises the limit to 0.3% in Article 4 (EUR-Lex 32021R2115). The older value still circulates on the internet, so the date with such a number is more important than the number itself.

Cultivation requires registration with the Agency for Restructuring and Modernization of Agriculture and certified seed material from the variety catalog. Hemp has a long tradition in Poland: since the 16th century, fiber from domestic crops was shipped through Gdańsk for ship ropes and canvas, and the decline only came with cheap synthetic fibers in the 20th century. Neither indica nor ruderalis are listed in the EU variety catalog, so the question “from which species is this flower” has only one legal answer.

How much does a gram of legal hemp flower cost?

In the flower category at the store u Bucha, there are 34 available items, and the price range per gram reaches over four and a half times. The following summary shows six items from different price ranges, with a conversion to 1 gram, which is the only comparable measure here. Prices come from the store API and describe the state as of August 8, 2026.

Our observations indicate that this price range is determined neither by species nor by the declared profile. It is determined by the size of the package and whether you are buying whole flower heads or shredded material. The cheapest gram is trim from a 10 g sachet, the most expensive is a single gram of flower heads in a jar. If you are just checking the aroma of a specific variety, the extra cost for a small format may be justified.

Frequently Asked Questions

What are hemp and what is it used for?

Hemp is Cannabis sativa L., a species described by Carl Linnaeus in 1753. The plant grows to several meters, has narrow leaf segments, and flowers after the day is shortened. It is cultivated for fiber, seeds, and flower heads. All varieties permitted in the European Union belong to this species (EUR-Lex 32021R2115).

How do Indian hemp and hemp differ?

Cannabis indica Lam. grows low, from 0.5 to 2 meters, is bushy, and has wide leaf segments. It flowers for a shorter time, from 8 to 9 weeks, and produces a denser layer of glandular hairs. This is where phytocannabinoids are produced, so a richer resin translates into the traditional use of this form (Xie et al., Horticulture Research, 2023).

What is autoflowering and where did it come from?

Autoflowering is the transition to flowering after a certain number of days from germination, usually after 3 or 4 weeks, regardless of day length. This trait comes from Cannabis ruderalis, adapted to a short growing season. Photoperiodic varieties will only flower when the day is shortened to less than 12 hours.

Does the division into indica and sativa have a genetic basis?

Only partially. Genotyping of 81 intoxicating varieties and 43 fiber varieties showed a moderate correlation between genetic structure and declared origin, and the names of varieties often do not correspond to their genetic identity (Sawler et al., PLOS ONE, 2015). The division itself does not reliably describe what is in the plant.

How much THC can legal hemp flower contain in Poland?

The Act on Counteracting Drug Addiction defines fiber hemp as Cannabis sativa L., in which the sum of delta-9-tetrahydrocannabinol and tetrahydrocannabinolic acid in the flower tops does not exceed 0.3% dry weight (Dz.U. 2023 poz. 1939). The same threshold applies in the EU regulation 2021/2115.

What species does legal hemp flower in stores come from?

From hemp, i.e., Cannabis sativa L. The varieties listed in the EU catalog and legally cultivated in Poland belong to this species, and product cards provide the name of the variety, not the affiliation to indica or ruderalis. The composition of a specific batch is confirmed by an analysis certificate from an independent laboratory.

You can find the full offer of flower and trim from certified varieties of hemp in the flower category.

This article is for informational and educational purposes. It contains internal links to product categories available in the store u Bucha. Prices and specifications may change: please check the current data on the product page before purchasing.

Author: Michał Waluk · Published: 2026-06-27 · Updated: 2026-08-08