Understanding Trichomes

If you’ve ever seen cannabis up close you’ve no doubt noticed the little crystals covering the surface of the bud…

These crystals are called trichomes, the Greek word for ‘growth of hair’. This title however is a bit of a misnomer, as under a microscope, they start to look a lot more like little mushrooms. Lucky for us, the gland at the very top of these hair-like protrusions on the cannabis plant is a one-of-a-kind manufacturing facility for hundreds of known therapeutic compounds called cannabinoids, terpenes, and flavonoids.

But ……How is this possible? Little Chemicals called vacuoles and plastids are manufactured in the trichome’s hair like stalk. When they are ready, they make the voyage up the stalk to the head of the gland where they meet with ultraviolet (UV) light resulting in the birth of our favorite medicinal compounds, cannabinoids. Over the course of this manufacturing process however, the trichomes will begin to change color from clear to a milky white or amber shade (Hülskamp et al. 1999), which is important because it’s like a secret language signaling the perfect time to harvest.

That said, trichomes are not unique to cannabis. They grow all over the place, and they have many different uses. For example, some carnivorous plants have trichomes or ‘trigger hairs’ that help them catch their prey.

What are the types of Trichomes?

  1. Capitate-stalked: Capitate-stalked trichomes are the largest kinds, producing the lion’s share of compounds. These trichomes can even be seen by the naked eye because their structure consists of a stalk that ends in a little bulb (or basal cell) which attaches to a large gland head. This bulb at the top of a trichome serves as a sort of headquarters for cannabinoid and terpenoid synthesis.
  2. Capitate sessile: Capitate Sessile trichomes are slightly smaller and contain both a head and a stalk. And though they tend to be abundant, they are not quite as productive as their Capitate-stalked buddies.
  3. Bulbous: Bulbous trichomes are the smallest of the bunch and are comprised of just a handful of cells. Nevertheless, you can find the frosty looking bulbs all over the surface of the plant (Schellmann et al., 2004).

Also, the fact that Cannabis trichomes produce the very compounds that act in the endogenous cannabinoid system to create such a dreamy buzz is just a happy coincidence, as far as science is concerned (Hillig, Karl, 2004). Furthermore, trichomes evolved as the first line of defense to protect baby buds from insects, animals, fungal growth, and environmental dangers, and because of this promote growth. Whatever the reason may be, we’re not mad they’re here.

Hülskamp, M.; Schnittger, A.; Folkers, U. (1999). “Pattern formation and cell differentiation: trichomes in Arabidopsis as a genetic
model system”. International Review of Cytology. 186: 147–178. doi:10.1016/S0074-7696(08)61053-0. ISSN 0074-7696. PMID 9770299.

Schellmann, Swen; Hulskamp, Martin (2004-09-01). “Epidermal differentiation: trichomes in Arabidopsis as a model system”. The International Journal of Developmental Biology. 49 (5–6): 579–584. doi:10.1387/ijdb.051983ss. ISSN 0214-6282.

Source: The Weed Blog
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These articles were extremely helpful because of their wealth of knowledge. Additionally, they provided extra insight.