Trichome Structure

Trichome structure refers to the morphology and density of resinous glands covering cannabis flower, leaves, and stems. These hair-like structures vary widely across cultivars in size, shape, stalk length, and gland-head composition, with common classifications including capitate-sessile, capitate-stalked, and filamentous types. Trichome architecture is heritable and influenced by both genetic background and environmental conditions during cultivation. Breeders and researchers document trichome density and form as phenotypic markers tied to cannabinoid and terpene production. Understanding trichome variation is foundational to cannabis genetics because these structures accumulate secondary metabolites and directly impact resin yield and composition across different strain families.

Breeders select for trichome density and morphology to enhance resin production and cannabinoid concentration without increasing plant size or extending flower time. Trichome structure is also used as a visual selection criterion in early-stage breeding programs to identify promising phenotypes before laboratory testing.