Trichome Morphology

Trichome morphology refers to the structural characteristics and varieties of cannabis trichomes—the resinous, hair-like glandular structures on leaves and flowers. These structures vary in size, density, shape, and resin production capacity across different genetic lines and phenotypes. Breeders and researchers classify trichomes into several morphological types, including capitate-stalked (large, with a visible stalk), capitate-sessile (smaller, stalkless), and bulbous (very small, bulb-shaped) forms. Understanding trichome morphology is critical for identifying cultivar lineage, predicting cannabinoid and terpene production potential, and selecting parent plants for breeding programs. Trichome development timing, resin clarity progression, and density patterns are key observable traits used in phenotype selection.

Breeders select for trichome morphology to optimize resin yield, cannabinoid production windows, and hashish or concentrate quality. Trichome density and structure are heritable traits commonly used as markers for desirable cultivar phenotypes in controlled breeding populations.