Broad Leaflets

Broad leaflets refer to cannabis plants displaying wider leaf blade morphology compared to narrow-leaflet phenotypes, typically associated with indica-dominant genetics or indica/sativa hybrids. This trait reflects underlying genetic predispositions influencing leaf development and plant architecture. Broad leaflets are commonly observed in Central Asian and Hindu Kush lineages, where selection pressure favored stockier growth patterns and larger foliar surface area. The width-to-length ratio of individual leaflets can vary significantly even within a single strain family, influenced by both genotype and environmental conditions during vegetative growth. Breeders tracking morphological markers often document leaflet width as part of phenotype cataloging and parent plant selection protocols.

Breeders working with broad-leaflet traits often use this as a visual marker for indica genetic background when conducting hybrid crosses or stabilizing new lines. Leaflet morphology can correlate with flowering time, internode spacing, and overall plant vigor, making it a useful secondary phenotype descriptor during early generation selection.