Glandular Trichome Types

Glandular trichomes are specialized, hair-like structures on cannabis plant surfaces that produce and accumulate cannabinoids, terpenes, and other secondary metabolites. These structures vary in morphology—primarily classified as capitate-stalked, capitate-sessile, and bulbous types—each with distinct resin production characteristics. The density, size, and distribution of glandular trichomes are heritable traits commonly associated with resin yield and chemical profile diversity. Understanding trichome architecture is foundational to cannabis genetics, as these structures directly influence the final product's cannabinoid and terpene composition. Breeders and researchers study trichome development across growth stages to map genotype-to-phenotype relationships.

Breeders selectively cultivate lines exhibiting high-density or morphologically distinct glandular trichomes to target resin production and secondary metabolite accumulation. Trichome phenotyping—via microscopy and morphological assessment—is a standard tool in controlled breeding programs to maintain or amplify desired chemotype profiles across generations.