The leaves of the cannabis plant (including both industrial hemp and medicinal/recreational varieties) are one of its most distinctive botanical features. They serve as the primary site for photosynthesis and vary significantly in appearance based on the specific strain and growth stage.

Cannabis leaves are characterized by several specific anatomical traits that aid in identification and health assessment:

• Palmate Structure: The leaves are divided into multiple leaflets that radiate from a single point at the base, resembling the shape of an open hand.
• Leaflet Count: A single leaf typically contains between 5 and 11 leaflets. This number can fluctuate depending on the age of the plant and its specific variety.
• Serrated Edges: Each leaflet features serrated or "toothed" edges, which is a hallmark of the species.
• Stem Arrangement: The arrangement of leaves on the plant's stem changes as the plant matures. They are usually arranged oppositely on the lower sections of the stem and transition to an alternate arrangement toward the top.

Different varieties of Cannabis sativa L. exhibit unique leaf characteristics that reflect their genetic heritage and environmental adaptations:

Beyond their role in photosynthesis, certain parts of the cannabis plant associated with leaf structures are vital for chemical production:

• Bracts and Resin: Near the female flowers (pistillate), small, sticky bracts or calyxes are found in the leaf axils. These bracts enclose seed-producing ovules and are a primary source of resin and cannabinoids like THC and CBD.
• Chemical Indicators: The terpene profile of the plant, which contributes to its aroma (e.g., earthy, citrus, or pine scents), is often reflected in the overall resin quality found near these leafy structures.