Gland Morphology

Gland morphology refers to the physical structure and form of trichomes—the crystalline, resin-producing glands covering cannabis flowers and leaves. These microscopic structures vary in shape, size, density, and stalk length across different genetic backgrounds and environmental conditions. Breeders and researchers examine gland morphology through microscopy to assess resin production potential and cannabinoid/terpene accumulation capacity. The three primary trichome types—capitate-stalked, capitate-sessile, and filamentous—differ in their contribution to the plant's chemical profile. Understanding gland morphology is fundamental to cannabis genetics work, as it directly correlates with extraction yields, preservation stability, and breeding for desired phenotypes.

Breeders select for specific gland morphologies to optimize resin yield, shelf stability, and processing suitability. Dense capitate-stalked trichomes, for example, are often prioritized in hash and concentrate breeding programs because they preserve cannabinoid and terpene compounds more effectively than smaller glandular structures.