Black R (Cannabis flos COSMA): hybrid of Black Domina and White Russian with caryophyllene
Black R is a pharmacy hybrid from one producer, with lineage from Black Domina and White Russian. We gather what is known about it, and separately what has not been demonstrated.
| Strain card | Black R |
|---|---|
| Producers | Cosma (1 pharmacy position) |
| Medical brand | the same as the producer |
| Alternative names | none |
| Category according to sources | hybrid |
| Leading terpene | caryophyllene |
| Other terpenes | humulene limonene myrcene |
| Lineage | established Black Domina × White Russian |
| Source consistency | one source |
- Who supplies it. Exclusively Cosma, so there is nothing to compare versions with, and a supply break means the absence of this strain, not another version of it.
- Profile. Led by caryophyllene, alongside humulene, limonene, myrcene. We do not provide percentage shares, as sources count them against different totals.
- Origin. Established lineage, parents are Black Domina and White Russian.
- What is missing. The profile describes one source, so there is nothing to compare it with.
Where does Black R come from and what does its lineage say about it?
Black R was created by crossing Black Domina with White Russian, and two Polish industry services additionally describe it as a phenotype of the Black Russian line. It reaches pharmacies as Cannabis flos from one producer, issued exclusively by a doctor’s prescription in the Rpw category. Both sources consistently define the genetics as hybrid.
The lineage recorded for this position has two parents and comes from two independent descriptions, not from assumptions based on the name’s sound. It is worth immediately noting the boundary of such information. The lineage indicates which breeding lines the strain was derived from, and that is where it ends. It does not predict the chemical composition of a specific batch or how anyone will tolerate the raw material.
The common part of the name can mislead here. In Polish pharmacies, there are also Black Jelly and Black Tuna, but none of them share an established parent with Black R, so the similarity of the first word does not create any kinship between them. The same note applies to the Russian part: the phenotype of the Black Russian line is a record of the origin of this one strain, not an invitation to add its relatives based solely on the catalog’s sound.
Hemp material available for retail sale, for example in the herb category in our store, comes from fiber strains and is not a medicinal product. Black R belongs to a completely different regulatory shelf, and these two materials do not replace each other nor can they be compared.
Who supplies Black R to Polish pharmacies?
One producer. Black R is available in the Polish pharmacy market exclusively as Cosma’s flower and corresponds to one position in the collected assortment. There is no choice between versions from different companies here, which can be real for more popular strains. Comparing versions comes down to describing this one.
| Producer | Raw material form | What distinguishes this version |
|---|---|---|
| Cosma | Cannabis flos, Rpw category | The only version of Black R in the collected assortment; declared THC content recorded as a range of 19.8-24.2%; genetics described as hybrid |
Availability is not a feature of the strain, but a state of stock, and changes faster than any description can become outdated. A single position from one producer means that supply breaks cannot be replaced. Where the same strain is handled by five companies, the absence of one version is compensated by another; here there is nothing to compensate for. The current state collects a summary of available strains.
You will not find prices in this text, and it is not an oversight. The rate per gram and the cost of a month of therapy depend on the pharmacy and the mode of reimbursement, changing more often than the assortment, and therefore they are only in the collective summary, where they can be updated in one place. Other positions from this producer are described in a separate entry about Cosma’s portfolio.
It is also worth noting what a single entry in the register means for repeatability. Subsequent batches of the same name come from separate collections, so the active substance content falls within the declared range, but is not identical in every package. It is the batch number on the packaging, not the strain name, that distinguishes specific deliveries.
What aroma and taste do sources attribute to this strain?
- humulene humulene
- caryophyllene caryophyllene (leading in the pharmacy list)
- limonene limonene
- myrcene myrcene
The aroma description comes from one database and combines citrus notes with spicy, earthy, and herbal. This is a set of descriptors assigned to the entire catalog position, not a measurement result, so we treat it as a report from one source, not as a confirmed feature. The second database that mentions this strain does not describe the scent at all.
Aromatic descriptors are the softest layer of data in strain descriptions. They arise from impressions, not from chromatography, and the same words mean different things to different people: spicy can mean clove to one author and pepper to another. Thus, the list of five notes indicates more the direction of the character of the flower than what exactly the patient will feel upon opening the package.
The set of components recorded for this strain includes caryophyllene, humulene, limonene, and myrcene, and this description of the aroma does not contradict it. The peppery impression is usually attributed to caryophyllene, the hoppy note to humulene, the citrus note to limonene, and the earthy note to myrcene. This is qualitative consistency and only that: it shows that the aroma description and the composition description come from the same reality, not that one results from the other.
No numbers stand next to the names of the profile components here, and this is a decision, not an oversight. Polish databases publish shares without a denominator: the same positions summed give 46, 73, or 83 percent at different times. Since the sum depends on who counted, a single value next to the component name cannot be comparable between sources, and the entry in the article pretends to precision that no one measured.
How long does it take for this flower to take effect and how long does it last?
The method of intake determines this, not the strain name. For Black R, no absorption measurement has been published, so the ranges below describe the method of administration as such and apply equally to any flower from the pharmacy. The following paragraph is repeated in this service intentionally, instead of rewriting the same fact eighty-five times in different words.
The method of administration determines the course more than the strain itself, and the ranges below describe it, not this cultivar, because pharmacokinetic studies for a single cultivar have not been published.
| Vaporization | After swallowing | |
|---|---|---|
| First sensations | after a few minutes | from half an hour to two |
| Onset | another ten to thirty minutes | slow, over several hours |
| Total duration | within two to four hours | after six, sometimes eight hours |
| Typical error | none | taking a dose after thirty minutes, which gives both doses at once |
No separate data for this position exist, and it is hard to expect them. Pharmacokinetic studies are conducted for products with established, repeatable compositions, and flower differs between batches even within one name. The declared range of 19.8-24.2% speaks of the potency of the raw material, not the speed at which this raw material will act.
What has been demonstrated about the effects of Black R, and what remains anecdotal?
Very little has been demonstrated, and not for this strain. The evidence we have concerns a single component of the profile, not the Black R flower, and what circulates in commercial descriptions and patient reports is a separate layer that should not be mixed with studies. Below, we separate one from the other, starting with what has actually been measured.
The component opening the profile of this strain has been the subject of two studies worth describing in detail, rather than summarizing with a catchphrase.
| Study | Model and method of administration | What was demonstrated |
|---|---|---|
| Gertsch J et al., 2008 Proceedings of the National Academy of Sciences (PNAS) PMID:18574142 |
mouse (in vivo) and test tube (receptor binding, human cells) | (E)-caryophyllene selectively bound to the CB2 receptor (Ki = 155 nM) and inhibited carrageenan-induced paw swelling in wild-type mice, but not in CB2 receptor-deficient mice (Cnr2-/-), indicating a CB2-dependent mechanism; the study did not include any anxiety tests. |
| Klauke AL et al., 2014 European Neuropsychopharmacology PMID:24210682 |
rodent (mouse) | Oral caryophyllene reduced late inflammatory pain in mice in the formalin test in a CB2 receptor-dependent manner, with no effect on the early phase; in a neuropathic pain model, it alleviated thermal hyperalgesia and mechanical allodynia without developing tolerance with chronic administration. |
Neither of the two studies tested caryophyllene on humans or in inhaled form from flower; both works concern oral or systemic administration in mice in pain and inflammation models, not sleep or mood.
The profile of components of this strain is described by one source. The second Polish database mentions Black R, but does not provide the set or order of components, so there is nothing to compare: this is not the consistency of two independent descriptions, but a lack of a second voice. Manufacturer materials and patient reports characterize this strain as balanced, but such a word does not come from measurement and does not carry any conclusion about effectiveness.
What side effects have been reported from this strain?
No side effects have been reported for Black R by name. Safety monitoring is conducted at the level of the medicinal product with a batch number, and the strain name is not a reporting unit, so separate statistics for this position do not exist and will not be created. The following description concerns hemp flower as a group of raw materials.
Reports of adverse effects are collected for the medicinal product with a batch number, not for the strain name, so the following concerns hemp flower as a group of raw materials. The most commonly reported are dry mouth, red eyes, and increased heart rate. Less frequently described are dizziness upon rapid standing, daytime drowsiness, and transient worsening of short-term memory, as well as anxiety increasing with dosage. A separate issue is medications taken concurrently, especially sedatives and those affecting coagulation: their assessment requires knowledge of the entire list of preparations, not just the description of the plant. We do not provide the frequency of these symptoms numerically, as public summaries for hemp flower in Poland do not separate them by individual products.
The only thing that can be added from the strain itself is its declared potency. The range of 19.8-24.2% places Black R among positions with high THC content, and the intensity of symptoms such as anxiety or increased heart rate rises with the dose taken. The assessment of whether this matters in a specific case belongs to the attending physician, not to the strain description.
At what temperature is this flower vaporized?
There is no specific temperature for the strain; there is a working range of the device. The boiling temperatures of individual profile components may be provided as a guideline, but they are not a vaporizer setting and do not translate directly to it. Below you can see why such a table fails particularly clearly with this profile.
| Profile component | Boiling record from the source | Measurement conditions |
|---|---|---|
| Myrcene | 166-167 °C | atmospheric pressure |
| Limonene | 175-176 °C | atmospheric pressure |
| Caryophyllene | 256-259 °C | atmospheric pressure |
| Humulene | 99-100 °C | reduced pressure, 3 mmHg |
Two things in this table spoil the whole idea of reading the profile by temperature. The first: the component listed first for Black R boils well above two hundred fifty degrees, which is outside any range in which vaporizers for flower operate. The second: for humulene, public records provide a value measured under reduced pressure, and such a number cannot be placed in the same row with the others, as it describes different conditions.
Additionally, there is a difference between the setting and the reality of the material inside. The number on the display describes the heating element or chamber, not the plant material inside, and the discrepancy can reach several dozen degrees and depends on the device’s construction and the packing of the flower. This breaks down a separate entry about why the vaporizer setting is not the temperature of the flower, and discrepancies between the boiling tables are explained by another.
The conclusion from this comparison is short and not very impressive. Boiling temperatures organize knowledge about molecules, while they are not suitable for selecting a setting for a specific strain name. The profile of Black R does not indicate a setting that would be more appropriate for it than for any other flower from the pharmacy.
Which strains from Polish pharmacies are related to it?
None. In the pedigree graph of this cluster, neither Black Domina nor White Russian appears as a parent of another strain present in Polish pharmacies, so Black R has no siblings here. The lineage is known, and relatives are still absent, and these two things do not exclude each other at all.
An empty list can be a correct result, not a gap to fill. Siblings arise when two strains from the pharmacy share an identified parent; if the parental line does not appear in any other pedigree, there is nothing to build a connection from. Adding a few similarly sounding names here would create a denser and completely false graph, and a false connection is worse than its absence because it looks like information.
Those looking for positions with a similar character will find them more quickly by the leading component than by the parents. Strains where caryophyllene is the first component in the profile are collected in a separate discussion of this component, and a complete list of strains available in Polish pharmacies along with the current assortment is maintained in a collective summary. None of these summaries replace a conversation with the attending physician overseeing the treatment.
The last caveat concerns the graph itself. It is based on pedigrees that breeders have revealed or have not wanted to reveal, so further source determination may add a connection that is currently absent. Thus, the absence of siblings describes the state of knowledge at the time of writing, not a permanent property of the strain.
Frequently asked questions about the Black R strain
Can Black R be purchased without a prescription?
No. Cannabis flos is a pharmaceutical raw material issued by a doctor’s prescription in the Rpw category, so it cannot be dispensed in a pharmacy without a valid prescription.
How many producers supply Black R to Polish pharmacies?
One. In the collected assortment, the strain corresponds to one pharmacy position, produced by Cosma, so there is no choice between versions from different companies here.
What THC content is declared for this strain?
We provide it as a range of 19.8-24.2%. The allowable tolerance of the producer reaches ten percent of the nominal value, so a single number does not describe what goes into the package.
What components are listed in the terpene profile of Black R?
Caryophyllene, humulene, limonene, and myrcene. The set comes from one source, and we do not provide percentage shares next to these names because databases publish them without a denominator.
Does Black R have siblings among pharmacy strains?
No. The parents of this strain, namely Black Domina and White Russian, do not appear in the pedigrees of other strains present in Polish pharmacies, so the list of related positions is empty.
Do studies confirm the effect of this strain on sleep or mood?
No. Available works concern a single component of the profile administered to mice in pain and inflammation models, not the flower of this strain and not humans.
Text by ubucha.pl. Informational material about the pharmaceutical raw material issued by a doctor’s prescription; does not replace medical advice.
