Sessile Glands

Sessile glands are trichomes—microscopic resin-producing structures—that lack a stalk or stem, sitting flush against the plant surface. Unlike stalked trichomes that elevate cannabinoid and terpene production above the leaf cuticle, sessile glands are embedded directly into the epidermis. Cannabis breeders and cultivators observe sessile gland density as one marker of resin production potential, though total trichome architecture (stalked + sessile) determines overall secondary metabolite yield. Sessile glands are commonly associated with older cannabis cultivars and landrace genetics, where they often coexist with larger stalked capitate trichomes. Modern breeding programs frequently select for mixed trichome populations to optimize both cannabinoid potency and aromatic compound expression.

Breeders working in preservation and landrace stabilization track sessile gland expression as a heritage trait indicator. Selection pressure toward higher stalked-to-sessile ratios in contemporary cultivars has shifted commercial genetics, making sessile-dominant phenotypes increasingly rare in modern seed lines.