Trichome Types

Trichome types represent the microscopic, hair-like structures on cannabis plant surfaces that produce and store cannabinoids, terpenes, and other secondary metabolites. Plant scientists and breeders classify these structures into three primary morphologies: bulbous trichomes (smallest, single-celled heads), capitate-sessile trichomes (medium-sized, eight-celled heads on short stalks), and capitate-stalked trichomes (largest, spherical heads on elongated stalks). Trichome density, shape, and relative abundance vary significantly across cultivars and are influenced by both genetics and environmental conditions. Understanding trichome morphology is foundational to breeding programs, as these structures directly correlate with resin production capacity and chemical composition profiles.

Breeders select for trichome type and distribution as a key marker of cultivar phenotype and resin productivity. Trichome characteristics are observable traits used in early generation selection, allowing breeders to identify and stabilize lines with desired cannabinoid and terpene expression patterns.