Cannabis spp. (pistillate inflorescence and leaf)

Nomenclature

Cannabis sativa L.   Cannabaceae

Botanical Voucher Specimen

Source: MOBOT, Tropicos.org

Organoleptic Characteristics

Scent Narcotic type (heavy,nauseating, and suffocating;increased by moisture) Source: American Herbal Products Association. March 2013. Organoleptic Analysis of Herbal Ingredients. AHPA: Silver Spring, MD

Macroscopic Characteristics

“…Cannabis is an annual, dioecious (the flowers on individual plants are unisexual), flowering herb. Staminate (male) plants are usually taller but less robust than pistillate (female) plants.” “…Stem is green, erect, hollow and longitudinally grooved. It can vary from 0.2-6 m, although most of the plants reach heights of 1-3 m. The extent of branching, like plant height, depends on environmental and hereditary factors as well as the method of cultivation. The side branches vary from opposite to alternate at any part of the main stem. The leaf arrangement changes from decussate (oppositely arranged) to alternate on the extremities of the plant. Leaf stalks (petioles) are 2-7 cm long with a narrow groove along the upper side. The leaf is palmate and consists of 3-9 linear-lanceolate leaflet blades of 3-15 x 0.2-1.7 cm. The margins are coarsely serrated, the teeth pointing towards the tips; the veins run out obliquely from the midrib to the tips of the teeth. The lower (abaxial) surfaces are pale green with scattered, white to yellowish brown, resinous glands.” “…The pistillate (female) flowers are more or less sessile and are borne in pairs. Each flower has a small green bract enclosing the ovary with two long, slender stigmas projecting well above the bract.” Source: Recommended methods for the identification and analysis of cannabis and cannabis products, United Nations Office on Drugs and Crime, Vienna, 2009. (ST/NAR/40) Source: Köhler, Medizinal-Pflanzen in naturgetreuen Abbildungen und kurzerläuterndemTexte (1887)

Microscopic Characteristics

“… Cannabis sativa can be identified by microscopic structures on the surface of the plant, namely, by trichomes. Two types of trichomes occur and can be observed with a binocular microscope with a magnification factor of 40: (a) Non-glandular trichomes are numerous, unicellular, rigid and curved hairs, with a slender pointed apex: - Cystolithic trichomes found on the upper surface of the cannabis leaves have a characteristic bear claw shape and may have calcium carbonate crystals (cystoliths) visible at their bases. Frequently, the trichome is broken and the cystolith freed; - Non-cystolithic trichomes occur mainly on the lower side of the leaves, bracts and bracteoles and lack the enlarged base; - The simultaneous presence of these bear claw-shaped trichomes on the upper surface and the fine, slender non-cystolithic trichomes on the lower surface of the leaves is a characteristic of cannabis. (b) Glandular trichomes. They occur as: - Sessile glands, i.e. trichomes without stalk, which are generally found on the lower epidermis; - Small bulbous glandular trichomes with one-celled stalks; - Long multicellular stalks on the bracteoles surrounding the female flowers (multicellular stalked glandular trichomes). These are mainly associated with the flower structures (pistillate plants being particularly rich in these structures) but they can also be found on the underside of the leaves and occasionally on the stems of young plants. Some plants possess trichomes that may be confused with those present on Cannabis sativa and care should be taken in definitive identification. However, the combination of cystolithic hairs on the leaf upper surface and longer trichomes and sessile glands on the lower surface, which is unique to Cannabis sativa, enables positive identification of even fragmented material.” Source: Recommended methods for the identification and analysis of cannabis and cannabis products, United Nations Office on Drugs and Crime, Vienna, 2009. (ST/NAR/40)

Gas Chromatography Identification

Cannabis spp. Internal Standard Solution: 1 mg/mL 4-androstene-3,17-dione in a mixture of chloroform and methanol (1:9). Test Sample Preparation: 100 mg ground plant material in 3 mL of Internal Standard Solution, macerate at room temperature for 1 h,sonicate for 5 min, filter, and use the filtrate. Column: 15-m x 0.25-mm, 0.25-um film, J&W Scientific DB-1 Oven Program: 170°C for 1 min, increase to 250°C at 10°C/min, hold at 250° for 3 min. Injection Port: 240°C Detector: FID, 260°C Carrier Gas: Helium Injection volume: 1 uL Source: National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, USA Source: National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, USA Source: National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, USA Source: National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, USA Source: National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, USA [[Category:National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, USA]] [[Category:National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, USA]] [[Category:National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, USA]] [[Category:National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS 38677, USA]]