Trichome Type

Trichome type refers to the morphological classification of resin-producing glandular structures on cannabis plant surfaces, categorized primarily by head diameter and stalk length into bulbous, sessile, and stalked varieties. These microscopic structures accumulate cannabinoids, terpenes, and flavonoids, making trichome morphology a significant marker in breeding programs and plant assessment. Different trichome types are often associated with distinct resin profiles and plant vigor characteristics across cannabis lineages. Breeders working in modern cultivar development frequently select for specific trichome architectures to achieve desired phenotypic outcomes. Trichome type observation requires magnification (typically 60–100x) and represents one of the few readily observable genetic traits without biochemical testing.

Breeders use trichome type as a phenotypic selection criterion because it correlates with resin production potential and cannabinoid/terpene accumulation patterns. Stalked trichomes, for example, are commonly associated with higher secondary metabolite concentrations and are prioritized in many modern breeding lines.