Dense Bract Structure

Dense bract structure refers to tightly packed, overlapping floral bracts—the modified leaves surrounding cannabis flowers. This physical characteristic is primarily a morphological trait rather than an aroma descriptor, though dense bracts can affect terpene concentration and volatile compound expression by creating micro-environments during development and drying. Lineage records frequently report dense bracts in indica-influenced genetics and certain Afghan and Hindu Kush-derived cultivars. The trait influences resin gland density and surface area, which breeders monitor as a proxy for cannabinoid and terpene accumulation. Dense bracts are often associated with extended flowering periods and require careful drying conditions to prevent mold risk.

Breeders working in this category select for dense bract structure to maximize resin production and improve consistency across generations. The trait is tracked as a stability marker in indica and hybrid breeding programs, particularly when targeting commercial extraction or concentrate production.