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  • The top side of a new cannabis leaf imaged with a scanning electron microscope (SEM). Width of the image is 4 mm.
    K17SEM_leaf10B.jpg
  • An SEM image of a bract leaf that extends from the center of a cannabis bud. This type of leaf has high concentrations of the glandular trichomes that produce THC. Width of the leaf is 4 mm.
    170614leafE029pan1.jpg
  • An SEM image of a bract leaf that extends from the center of a cannabis bud. This type of leaf has high concentrations of the glandular trichomes that produce THC. Width of the leaf is 4 mm.
    170614leafE029pan3.jpg
  • SEM image of a transverse section through a cannabis (Cannabis sativa) plant root. The image shows a field of view 3 mm wide at this location.
    K1700515seed012root-tip.jpg
  • The underside of a new cannabis leaf imaged with a scanning electron microscope (SEM). Width of the image is 3 mm.
    170515cryoZ-028bottom-pan1.jpg
  • Scanning electron micrograph (SEM) of mature female Cannabis bud (Cannabis sativa) showing globular trichomes – the location of the highest concentration THC.  magnification x120 when printed 10 cm wide.
    K14-SEM-pot22A.jpg
  • SEM image of a transverse section through a cannabis (Cannabis sativa) plant root. The root at this location is 4 mm in diameter.
    K170614rootp089pan1.jpg
  • SEM image of a transverse section through a cannabis (Cannabis sativa) plant root. The root at this location is .5 mm in diameter.
    K170614rootN072pan1.jpg
  • The underside of a new cannabis leaf imaged with a scanning electron microscope (SEM). Width of the image is 8 mm.
    K170509M081full-PAN2.jpg
  • A cannabis seedling showing the first set of true leaves. Imaged with a scanning electron microscope (SEM). False color has been applied. The marijuana plant produces tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The filed of view in this image is 4 mm wide.
    K170428-4dayPA003C.jpg
  • A cannabis seedling showing the first set of true leaves. Imaged with a scanning electron microscope (SEM). False color has been applied. The marijuana plant produces tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The filed of view in this image is 5 mm wide.
    K170428-4dayP.jpg
  • The vain of a cannabis leaf imaged with a scanning electron microscope (SEM). Width of the image is 2 mm.
    K17leaf-vain01.jpg
  • The underside of a new cannabis leaf imaged with a scanning electron microscope (SEM). Width of the image is 8 mm.
    K170509M081full-PAN1.jpg
  • Light Microscope image of a transverse section through a cannabis (Cannabis sativa) plant stem. The root at this location is 6 mm in diameter.
    K17stem-near-root.jpg
  • A cannabis seedling showing the first set of true leaves. Imaged with a scanning electron microscope (SEM). False color has been applied. The marijuana plant produces tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The filed of view in this image is 4 mm wide.
    K170428-4dayPA003B.jpg
  • The top side of a new cannabis leaf imaged with a scanning electron microscope (SEM). Width of the image is 4 mm.
    K17SEM_leaf10C.jpg
  • A close up of the seed leaf or cotyledon of a cannabis plant. Imaged with a scanning electron microscope (SEM). The surface of the cotyledon. The cotyledon is the scientific name for the fist two leaves the plant makes. In reality, these two leaves are actually folded up inside the seed, so this structure is often called the seed leaves. It is important that the seeding gets these leaves unfolded and oriented correctly quickly to start photosynthesis and start False color has been applied. The marijuana plant produces tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The filed of view in this image is 1.2 mm wide.
    K170428-4dayPD024.jpg
  • A cannabis seedling showing the first set of true leaves. Imaged with a scanning electron microscope (SEM). False color has been applied. The marijuana plant produces tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The filed of view in this image is 8 mm wide.
    K170428-4day016.jpg
  • The top side of a new cannabis leaf imaged with a scanning electron microscope (SEM). Width of the image is 2 mm.
    K17SEM_leaf11B.jpg
  • The top side of a new cannabis leaf imaged with a scanning electron microscope (SEM). Width of the image is 4 mm.
    K17SEM_leaf8A.jpg
  • SEM image of a transverse section through a cannabis (Cannabis sativa) plant root. This image shows a field of view of .2 mm.
    K170614rootpan2.jpg
  • A cannabis seedling showing the first set of true leaves. Imaged with a scanning electron microscope (SEM). False color has been applied. The marijuana plant produces tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The filed of view in this image is 3 mm wide.
    K170429cryo-3-015BW.jpg
  • A cannabis seedling showing the first set of true leaves. Imaged with a scanning electron microscope (SEM). False color has been applied. The marijuana plant produces tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The filed of view in this image is 3 mm wide.
    K170429cryo-3-015.jpg
  • A cannabis seedling showing the first set of true leaves. Imaged with a scanning electron microscope (SEM). False color has been applied. The marijuana plant produces tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The filed of view in this image is 4 mm wide.
    K170428-4dayPA003A.jpg
  • The top side of a new cannabis leaf imaged with a scanning electron microscope (SEM). Width of the image is 4 mm.
    K17SEM_leaf10A.jpg
  • The underside of a new cannabis leaf imaged with a scanning electron microscope (SEM). Width of the image is 3 mm.
    170515cryoZ-028bottom-pan2.jpg
  • The top side of a new cannabis leaf imaged with a scanning electron microscope (SEM). Width of the image is 4 mm.
    K17SEM_leaf9A.jpg
  • A SEM image of the edge of a leaf shows a calcium oxalate crystal. These crystals are found throughout the plant and are responsible for throat irritation when medical marijuana is smoked. Plants that have too many oxalate crystals are good candidates for modern THC extraction techniques. Calcium oxalate crystals in plants are called raphides. Humans have similar calcium crystals that can appear as kidney stones. These crystals help remove calcium build up in the tissues and make it undesirable for grazing animals to eat the plant. Magnification is x120 on the printed page.
    K170406z056.jpg
  • SEM image of a transverse section through a cannabis (Cannabis sativa) plant root. The root at this location is 4 mm in diameter.
    K170610LM01A.jpg
  • The top side of a new cannabis leaf imaged with a scanning electron microscope (SEM). Width of the image is 4 mm.
    K17SEM_leaf9B.jpg
  • The top side of a new cannabis leaf imaged with a scanning electron microscope (SEM). Width of the image is 2 mm.
    K17SEM_leaf11A.jpg
  • An SEM image of a bract leaf that extends from the center of a cannabis bud. This type of leaf has high concentrations of the glandular trichomes that produce THC. Width of the leaf is 4 mm.
    170614leafE029pan2.jpg
  • The top side of a new cannabis leaf imaged with a scanning electron microscope (SEM). Width of the image is 4 mm.
    K17SEM_leaf8B.jpg
  • A light microscope image of the epidermal layer of a cactus (unidentified) showing  numerous calcium oxalate crystals.  Calcium oxalate crystals in plants are called raphides, in humans they can appear as kidney stones. These crystals help remove calcium build up in the tissues and make it undesirable for herbivore animals to eat the plant.Photo taken at 20x.
    K14-oxalatextal72.jpg
  • A light microscope image of the epidermal layer of a cactus (unidentified) showing  numerous calcium oxalate crystals.  Calcium oxalate crystals in plants are called raphides, in humans they can appear as kidney stones. These crystals help remove calcium build up in the tissues and make it undesirable for herbivore animals to eat the plant.Photo taken at 40x.
    K14-oxalatextal71.jpg
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