GUSTOIMAGES / SCIENCE PHOTO LIBRARY GUSTOIMAGES / SCIENCE PHOTO LIBRARY
Cannabis leaf. Leaf of the Cannabis (or hemp) plant (Cannabis sativa), source of an intoxicating drug. The Cannabis plant is also cultivated for its fibrous stems and its seed oil. The drug is produced in resin glands on the plant's surface, including the leaves, but is most concentrated in the female flowers. The drug is banned in many countries.
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