Harlequin: Cultivar Profile With Sources, Lineage Claims and Lab Data Limits

Harlequin is a cannabis cultivar (commonly called a strain) that is usually described as rich in CBD, a compound found alongside THC in many plants. A reputation is not a measurement, so this page keeps the name, the ancestry story, lab findings and research apart. It is information only. "Preclinical" means cells or animals only; "Proper evidence not found" means we looked and found nothing usable.

Identity and breeder attribution

A seed-variety database lists four entries named Harlequin from different seed companies.[1] An editorial profile credits the creation to a breeder called Mr. Green of the House of David Collective, who it says was breeding for a hash-producing plant, not a medicinal one, and who had the result tested when it did not seem to get his friends very high.[2] We record the attribution as reported, not verified, and the confidence as low. See lineage claims and breeder attribution.

Reported lineage

The same profile reports a cross of three landrace sativa types (an early-1970s Colombian Gold male, a Thai plant and a Swiss landrace) with a Nepalese indica.[2] A seed-database entry gives a close version: a Columbian Gold from the early 1970s, a Thai from mountains near Laos, a Swiss landrace and an indica from Nepal's Mustang area, adding that the plant was bred to produce hashish.[3] Those accounts are probably not independent of one another. Another seed company describes a 75 percent sativa, 25 percent indica makeup,[4] which is a marketing way of describing ancestry, not a chemical measurement. See cultivar names, aliases and conflicts.

Classification

Retail labels call it sativa-dominant, and the editorial profile also calls it a high-CBD chemovar.[2][4] Chemically, two peer-reviewed studies use the name Harlequin for a plant they describe as CBD-dominant or high-CBD: a plant-science study of water availability in two CBD-dominant varieties, Fenomoon and Harlequin,[5] and a study of ethanolic extracts from nine genotypes that grouped Harlequin among seven high-CBD genotypes.[6] Neither study gives a lineage or a batch for the plants, so they show that a plant sold under this name can be CBD-rich, not that every one is. See THC-dominant, CBD-dominant and mixed chemotypes and why labels do not predict effects.

Appearance

The editorial profile describes large, multi-colored flowers that suggest a jester's costume, which it gives as the source of the name.[2] This is one writer's description.

Aroma and constituents

The editorial profile describes a sweet, almost fruity taste,[2] and a seed-database entry describes a sweet, syrupy smell.[3] Both are seller or editorial descriptions. We did not find a readable measured terpene profile tied to a batch, so we do not infer one from the name.

Potency and cannabinoid data

Verified batch data was not available. We checked Europe PMC studies and the seed-database and editorial pages. The two studies above classify the plant as CBD-dominant but we did not extract a batch-level result with sample ID, laboratory, date and units for this page, so we record no numbers. The water-availability study also measured THC in its Harlequin plants, so "CBD-dominant" is not "THC-free," and it reported that cannabinoid content changed with growing conditions, one reason the same name does not give identical results.[5] The editorial profile itself says anyone can call a plant Harlequin whatever its THC or CBD levels.[2] See how to read a cannabis COA.

Reported experiences

The editorial profile mentions a "warm, glowy feeling,"[2] and a seed company describes clear-headed, alert effects.[4] These are seller-side and editorial impressions: anecdote, not controlled research, and they cannot predict how a person will feel.

Research

Human research on the cultivar: Proper evidence not found. Cell research (preclinical): in a laboratory screen, the acid-form extract of the Harlequin genotype, like extracts of six other high-CBD genotypes, did not inhibit SARS-CoV-2 replication in infected Vero 6 cells.[6] That is a cell-culture result that says nothing about people. For CBD in general and for prescription CBD, see CBD and approved cannabinoid medicines; those pages do not validate this cultivar.

Safety

If a Harlequin-labeled product contains THC, THC can impair thinking, memory and body movement, and anxiety or panic are more common when a product is strong.[7] CBD products can also matter for people who take medicines; see CBD-medication interactions and when to seek urgent help.