Once sexual differentiation has occurred, the generation of female reproductive organs and their associated bracts increases total plant cannabinoid content. Bracts subtending the female flowers contain a greater density of glands than the leaves. The small cuplike bracteole (perigonal bract) enclosing the pistil has the highest cannabinoid content of any single plant part (Kimura and Okamoto 1970, Honma et al. 1971a & 1971b). Second only to this is the flower itself (Fetterman et al. 1971b). Since it has no reported epidermal gland structures, the cannabinoids present must be due to either undiscovered production sites or simple adherence of resin from the inner surface of its intimately associated bracteole. This conjecture is supported by the finding that the achenes do not contain substantial amounts of the cannabinoids (Fetterman et al. 1971b, Ono et al. 1972). Reproductive structures of the male plant are also provided with greater concentrations of the cannabinoids (Fetterman et al. 1971b, Ohlsson et al. 1971). Stalked glands have been observed covering the tepal, with massively stalked glands occurring on the stamen filament (Dayanadan and Kaufman 1976). In addition, rows of very large sessile glands are found situated in grooves on the anther itself (Dayanadan and Kaufman 1976, Fairbairn 1972) and apparently provide the pollen with a considerable cannabinoid content (Paris et al. 1975a).