Trichomes

Trichomes are specialized, hair-like structures covering cannabis plant surfaces, particularly abundant on flowers and leaves. These microscopic glands produce and store cannabinoids, terpenes, and flavonoids—the biochemically active compounds breeders and cultivators monitor closely. Trichome morphology includes capitate-stalked (large, glandular heads on stalks), capitate-sessile (smaller, stalkless glands), and filamentous (non-glandular hair) types. Resin gland density and maturation stage—indicated by trichome color shifts from clear to milky to amber—serve as primary visual markers for harvest timing and cannabinoid profile development. Understanding trichome structure is foundational to cannabis breeding, cultivation documentation, and botanical classification.

Breeders select for trichome density, size, and gland morphology to establish strain identities and predict resin production capacity. Trichome maturation rates are heritable traits used in breeding programs to standardize harvest windows and cannabinoid expression across generations.