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Glossary

Capitate-Sessile trichomes

Capitate-Sessile trichomes are the second-largest type of cannabis produced trichome, measuring roughly 75 micrometres in length once fully developed.

Cannabis plants produce three types of trichomes - Bulbous, Capitate-Sessile, and Capitate-Stalked trichomes. Capitate-Sessile trichomes are larger than bulbous trichomes, but smaller than capitate-stalked trichomes. 

 

What are trichomes?

 

Trichomes  are small, crystal like structures found on the surface of the flowers and some of the leaves of cannabis plants. They are a vital protective mechanism for the plant and also produce cannabinoids, terpenes, and flavonoids, which give cannabis its unique smell, flavour, and therapeutic effects.

 

How are trichomes extracted from cannabis plants?

 

In medical cannabis products that use whole plant extract, trichomes are usually extracted through a process called solvent extraction. This involves using a solvent (such as ethanol or CO2) to separate the trichomes from the rest of the plant material. The resulting concentrate is then refined and purified to create a potent extract with high levels of cannabinoids, terpenes, and flavonoids.

 

What is the difference between THC and CBD?

 

While CBD and THC are both cannabinoids produced in the trichomes, they have different effects on the body. THC is known for its psychoactive properties which can produce a "high" feeling (along with many medical applications), while CBD is non-intoxicating and offers therapeutic effects such as reducing inflammation, pain, and anxiety.

 

Can trichomes be seen with the naked eye?

 

Yes, some trichomes are visible to the naked eye, although they can be difficult to see without magnification. They appear as small, sparkling crystals on the surface of the plant and can range in colour from clear to amber.

To find out if you are eligible for medical cannabis treatment in the UK, check out our fast and free medical cannabis eligibility checker.

If you would like to learn more about medical cannabis in the UK, Releaf is here to help. In addition to this medical cannabis glossary, we have an extensive blog and education hub to explore, both filled with resources that UK medical cannabis patients, prescribers, and educators have been asking for.