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  • The leaf of a hops plant (Humulus lupulus) was dyed with florisene dye and photographed in UV light. The florisene dye shows the location of the veins in the leaf as yellow, while the normally green chlorophyll glows red under the UV light
    K19hops-leaf-1615B.jpg
  • Scanning electron micrograph (SEM) of the leaf top of a sacred lotus leaf (Nelumbo nucifera).   The structures on the top of the leaf contain micro-structures that repel water droplets better than any other material in nature.  The lotus leaf, an example of a super-hydrophobic plant.  The ability of the leaf to repel water is enhanced by the surface roughness.  The calibration bar is 10 um and the image was collected at a magnification of 7,940 x.
    K08SEMlotusleaf053b.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
  • 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
  • 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
  • SEM image of the surface of a hop leaf.  The thorn structure is designed to detour predators from eating the leaf.  It is these modified trichome structures that make the plant difficult to handle. this image was collected at 1,240x and represents a field of view of .1mm in the horizontal direction.
    K15SEM-hopsleaf017B.jpg
  • SEM image of the surface of a hop leaf.  The thorn structure is designed to detour predators from eating the leaf.  It is these modified trichome structures that make the plant difficult to handle. this image was collected at 585x and represents a field of view of .2mm in the horizontal direction.
    K15SEM-hopsleaf011B.jpg
  • Scanning Electron Micrograph (SEM) of the top surface of a Cannabis sativa (marijuana) leaf, showing trichomes. Magnification: 500X at 8x10" print size.
    K14sem-canna-16.jpg
  • Trichomes on a Rosemary leaf, chemically stained to show detail. Magnification was 40X on the 35mm sensor.
    K14-rosemarry30.jpg
  • A scanning electron microscope image of the bottom of a sunflower leaf (Helianthus sp.). Trichomes are structures that grow out from the epidermis, and can have several functions, including protecting the leaf from insects..
    K08SEMsunflower016.jpg
  • An electrophotography discharge image of a ginko leaf (Ginkgo biloba ).  Also called Kirlian Photography, this technique shows the electrical discharge around an object. The principle of electrography is based on the corona discharge phenomenon that takes place when an electrically grounded object generates an electrical field, discharging sparks between itself and an electrode.
    K08ginko-a.jpg
  • Scanning Electron Micrograph (SEM) of pumpkin skin(Cucurbita sp.). Magnification was 100x and the field of view of this image is 2mm wide. The stalked structures are trichomes (leaf hairs) on the under side of the pumpkin leaf.
    K170918pumpkin-bottomSEM17panC.jpg
  • SEM image of the surface of a hop leaf.  The thorn structure is designed to detour predators from eating the leaf.  It is these modified trichome structures that make the plant difficult to handle. this image was collected at 585x and represents a field of view of .2mm in the horizontal direction.
    K15SEM-hopsleaf011.jpg
  • An optical image of the cross section of a leaf support (petiole). The notch in the structure points up and is believed to be associated with water flow over the leaf structure.  The center of the structure is where the pith cells are located, in a mature leaf the center section would be completely filled with pith cells. This section has been dyed with neutral red and brilliant crystal blue.  This picture of the petiole shows a 3mm wide field of view.  This sample was stained to highlight cell structures.
    K13SEM-cannabis49.jpg
  • An optical image of the cross section of a leaf support (petiole). The notch in the structure points up and is believed to be associated with water flow over the leaf structure.  The center of the structure is where the pith cells are located, in a mature leaf the center section would be completely filled with pith cells. This section has been dyed with neutral red and brilliant crystal blue.  This picture of the petiole shows a 3mm wide field of view.  This sample was stained to highlight cell structures.
    K13SEM-cannabis21.jpg
  • Scanning Electron Micrograph (SEM) of pumpkin skin(Cucurbita sp.). Magnification was 100x and the field of view of this image is 2mm wide. The stalked structures are trichomes (leaf hairs) on the under side of the pumpkin leaf.
    K170918pumpkin-bottomSEM17panb.jpg
  • Flase color x-ray of a palm leaf collected in Texas. Leaf of a California fan palm (Washingtonia filifera), showing the many green fronds. This palm is native to the desert oases of California and Arizona, in the USA. It will easily reach over 15 meters in height when well-watered, growing over 30 centimeters per year.
    K15X-palmleaf24-Close.jpg
  • Flase color x-ray of a palm leaf collected in Texas. Leaf of a California fan palm (Washingtonia filifera), showing the many green fronds. This palm is native to the desert oases of California and Arizona, in the USA. It will easily reach over 15 meters in height when well-watered, growing over 30 centimeters per year.
    K15X-palmleaf24A.jpg
  • SEM image of the surface of a hop leaf.  The thorn structure is designed to detour predators from eating the leaf.  It is these modified trichome structures that make the plant difficult to handle. this image was collected at 1,240x and represents a field of view of .1mm in the horizontal direction.
    K15SEM-hopsleaf017.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
  • Section of a Rosemary leaf, chemically stained to show detail. Magnification was 40X on the 35mm sensor.
    K14-rosemarry28.jpg
  • The leaf of a cannabis plant was dyed with florisene dye and photographed in UV light. The florisene dye shows the location of the veins in the leaf.
    K19canna_0336DYE.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
  • False color Scanning Electron Micrograph (SEM) of the underside of a new marijuana leaf (Cannabis sativa). The 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.
    K170509cryotest-zhp-alcuE0.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
  • Flase color x-ray of a palm leaf collected in Texas. Leaf of a California fan palm (Washingtonia filifera), showing the many green fronds. This palm is native to the desert oases of California and Arizona, in the USA. It will easily reach over 15 meters in height when well-watered, growing over 30 centimeters per year.
    K15X-palmleaf24C.jpg
  • Flase color x-ray of a palm leaf collected in Texas. Leaf of a California fan palm (Washingtonia filifera), showing the many green fronds. This palm is native to the desert oases of California and Arizona, in the USA. It will easily reach over 15 meters in height when well-watered, growing over 30 centimeters per year.
    K15X-palmleaf24B.jpg
  • A scanning electron microscope image of the leaf of the lavender plant (Lavandula augustifolia ).  The branching cells give added protection from insects.  The pillow shaped structure produces the aromatic sent that gives lavender it characteristic smell.
    K07semLAV4layors.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
  • 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_leaf10B.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 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 underside of a new cannabis leaf imaged with a scanning electron microscope (SEM). Width of the image is 3 mm.
    170515cryoZ-028bottom-pan1.jpg
  • An X-ray of a Chestnut tree flower and leaf.
    hchestnut10.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
  • 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
  • The vain of a cannabis leaf imaged with a scanning electron microscope (SEM). Width of the image is 2 mm.
    K17leaf-vain01.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
  • 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
  • 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
  • Bacteria on the surface of a hop leaf.  This bacteria is unidentified. This image was collected at 12,230 and represents a field of view of 10um in the horizontal direction. The vine (Humuluslupulus) grows throughout Europe and the Americas.  Hops is extensively cultivated for the production of beer. Preparations of its flowers are used in herbal medicine to aid digestion and to relieve fever.
    K15Sem-hopsleaf022B.jpg
  • An optical image of the cross section of a cannabis stem.  The center of the structure is where the pith cells are located, in a mature leaf the center section would be completely filled with pith cells. This section has been dyed with neutral red.  This picture of thestem shows a 4 mm wide field of view.
    K13SEM-cannabis79.jpg
  • An X-ray a cabbage leaf
    K11-xcabbageleaf1C.jpg
  • Bacteria on the surface of a hop leaf.  This bacteria is unidentified. This image was collected at 12,230 and represents a field of view of 10um in the horizontal direction. This vine (Humuluslupulus). The vine (Humuluslupulus) grows throughout Europe and the Americas.  Hops is extensively cultivated for the production of beer. Preparations of its flowers are used in herbal medicine to aid digestion and to relieve fever.
    K15Sem-hopsleaf022.jpg
  • X-ray of a Grapevine leaf (Vitis vinifera).
    K14X-grapvine1B.jpg
  • X-ray of a Grapevine leaf (Vitis vinifera).
    K14X-grapvine1.jpg
  • An X-ray a cabbage leaf
    K11-xcabbageleaf1A.jpg
  • An X-ray of an Acanthus leaf (Acanthus mollis).   Native to the Mediterranean with lobed leaves with spiny margins and showy spikes.  THis plant is also called bear's breech.  A design patterned after acanthus leaves is often found on Corinthian columns.
    Acanthusxray1.jpg
  • Bacteria on the surface of a hop leaf.  This bacteria is unidentified. This image was collected at 58,000x and represents a field of view of 1.2um in the horizontal direction. The vine (Humuluslupulus) grows throughout Europe and the Americas.  Hops is extensively cultivated for the production of beer. Preparations of its flowers are used in herbal medicine to aid digestion and to relieve fever.
    K15Sem-hopsleaf020.jpg
  • An x-ray of ginko leaves.(Ginkgo biloba) also known as the maidenhair tree. The leaves are unique among trees in that they have no midrib and no network of veins; rather the venation consists of aconstantly branching fan from the base of the leaf.  Ginkgo biloba leaves and fruit are used in many herbal preparations.
    ginkgo3fix11x14levels.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
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. Thise is a low glandular trichomes that is close to the surface of the leaf. It secretes a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 20 um in diameter.
    K170510stem058thric.jpg
  • An x-ray of ginko leaves.(Ginkgo biloba) also known as the maidenhair tree. The leaves are unique among trees in that they have no midrib and no network of veins; rather the venation consists of aconstantly branching fan from the base of the leaf.
    ginkgo1fix11x14neg.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    K170614leafC016pan03.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609bractB008PANtk.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant, showing glandular cells, called trichomes. These trichomes are on teh surface of the leaf. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The circular cell structure a tthe center of the frame is 40 um in diameter.
    K170524CPD-triCN101mix.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170614leafH046pan.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170614leafH046pan2.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170613cola-bladeH043pan2.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170613cola-bladeH043pan1.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170613cola-bladeA002pan2.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609BractK035pan.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609BractD011pantk.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609bractC013pan2.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609BractA002pantk2.jpg
  • Close up of the leaf of a cannabis plant. The trichomes on the bud of a cannabis (Cannabis sativa) plant.  Glandular cells called trichomes. These stalked trichomes have glands at the sop that store THC. These trichomes secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug.  The width of the ball like structure is 90 um, or about the width of a human hair.
    K18optical-canna-bud20171011A.jpg
  • Close up of the leaf of a cannabis plant. The trichomes on the bud of a cannabis (Cannabis sativa) plant.  Glandular cells called trichomes. These stalked trichomes have glands at the sop that store THC. These trichomes secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug.  The width of the ball like structure is 90 um, or about the width of a human hair.
    K18optical-trichomeCanna2017-10-10A.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    K170614leafC016pan01.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170614leafF035pan2.jpg
  • Rare double glandular trichome. Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170614leaf-FREEK-B004pan3.jpg
  • Rare double glandular trichome. Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170614leaf-FREEK-B004pan.jpg
  • Rare double glandular trichome. Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170613FreakB010.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170613cola-bladeH043pan3.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170613cola-bladeA002pan3.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609BractN053PANtk2.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609BractM046pan2.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609BractD011pantk2.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609bractC013pan1.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609bractB008PANtk2.jpg
  • Cannabis plant. Colored scanning electron micrograph (SEM) of a trichome on the top of a leaf of a cannabis (Cannabis sativa) plant.  Magnification is x700 when printed 10 cm wide.
    K14SEM-cannabis53.jpg
  • Powdery mildew (Sphaerotheca pannosa) infection on a peony leaf.  Sample was collected in late summer in New York State.  The balls are fruiting bodies of the fungus that will distribute the spores to more plants.
    K09sem-mildew100.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    K170614leafC016pan02.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170614leafH046pan3jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170614leafF035pan1.jpg
  • Rare double glandular trichome. Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170614leaf-FREEK-B004pan2.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170613cola-bladeE028pan1.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609BractD011pantk3.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609BractE019pan.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609bractC013pan3.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609bractB008PANtk3.jpg
  • Powdery mildew (Sphaerotheca pannosa) infection on a peony leaf.  Sample was collected in late summer in New York State.  The balls are fruiting bodies of the fungus that will distribute the spores to more plants.
    K09sem-mildew103.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170613cola-bladeE028pan2.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609BractN053PANtk3.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609BractN053PANtk1.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609BractE019pan2.jpg
  • Rare double glandular trichome. Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170613FreakB010B.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170613cola-bladeA002pan.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609BractM046pan.jpg
  • Color-enhanced Scanning Electron Micrograph (SEM) of the surface of a marijuana (Cannabis sativa) plant leaf, showing glandular cells, called trichomes. These are capitate trichomes that have stalks. They secrete a resin containing tetrahydrocannabinol (THC), the active component of cannabis when used as a drug. The spherical cells at the top of the trichomes are 60 um in diameter.
    170609BractK035pan3.jpg
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Ted Kinsman

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