Hemp does best on a loose, well-aerated loam soil with high fertility and abundant organic matter. Well-drained clay soils can be used, but poorly-drained clay soils are very inappropriate because of their susceptibility to compaction, which is not tolerated. Young plants are sensitive to wet or flooded soils, so that hemp must have porous, friable, well-drained soils. Sandy soils will grow good hemp, provided that adequate irrigation and fertilization are provided, but doing so generally makes production uneconomical. Seedbed preparation requires considerable effort. Fall plowing is recommended, followed by careful preparation of a seedbed in the spring. The seedbed should be fine, level, and firm. Seed is best planted at 2–3 cm (twice as deep will be tolerated). Although the seedlings will germinate and survive at temperatures just above freezing, soil temperatures of 8°–10°C are preferable. Generally hemp should be planted after danger of hard freezes, and slightly before the planting date of maize. Good soil moisture is necessary for seed germination, and plenty of rainfall is needed for good growth, especially during the first 6 weeks. Seeding rate is specific to each variety, and this information should be sought from the supplier. Fiber strains are typically sown at a minimum rate of 250 seeds per m2 (approximately 45 kg/ha), and up to three times this density is sometimes recommended. In western Europe, seeding rates range from 60–70 kg/ha for fiber cultivars. Recommendations for seeding rates for grain production vary widely, from 10–45 kg/ha. Densities for seed production for tall, European, dual-purpose cultivars are less than for short oilseed cultivars. Low plant densities, as commonly found in growing tall European cultivars for seed, may not suppress weed growth adequately, and under these circumstances resort to herbicides may pose a problem for those wishing to grow hempseed organically. Hemp requires about the same fertility as a high-yielding crop of wheat. Industrial hemp grows well in areas that corn produces high yields. Growing hemp may require addition of up to 110 kg/ha of nitrogen, and 40–90 kg/ha of potash. Hemp particularly requires good nitrogen fertilization, more so for seed production than fiber. Adding nitrogen when it is not necessary is deleterious to fiber production, so that knowledge of the fertility of soils being used is very important. Organic matter is preferably over 3.5%, phosphorus should be medium to high (>40 ppm), potassium should be medium to high (>250 ppm), sulfur good (>5,000 ppm), and calcium not in excess (<6,000 ppm).
Hemp, or industrial hemp (from Old English hænep),[1] typically found in the northern hemisphere, is a variety of the Cannabis sativa plant species that is grown specifically for the industrial uses of its derived products.[2] It is one of the fastest growing plants[3] and was one of the first plants to be spun into usable fiber 10,000 years ago.[4] It can be refined into a variety of commercial items including paper, textiles, clothing, biodegradable plastics, paint, insulation, biofuel, food, and animal feed.[5]
I have a elderly small dog who is anxious and that won’t eat after his dental. He is a lean Italian Greyhound on the small side of the weight spectrum and he cannot afford to lose any weight. Unfortunately he is not recovering as well or quickly as the Vet had hoped. I had read and heard that CBD Oil would help increase the appetite? Of course I would run this by his Vet before trying it.
Both Bonn-Miller and Ward stress that it's up to the consumer to be well-educated about the material they're purchasing and the research that's out there. "The companies that are creating [cannabis oils] are offering lots of claims about its use that are not necessarily substantiated by any research," Bonn-Miller said. So "I think there needs to be, from a consumer standpoint, a lot of vigilance," he added.
The use of Cannabis as a mind-altering drug has been documented by archaeological finds in prehistoric societies in Eurasia and Africa.[85] The oldest written record of cannabis usage is the Greek historian Herodotus's reference to the central Eurasian Scythians taking cannabis steam baths.[86] His (c. 440 BCE) Histories records, "The Scythians, as I said, take some of this hemp-seed [presumably, flowers], and, creeping under the felt coverings, throw it upon the red-hot stones; immediately it smokes, and gives out such a vapour as no Grecian vapour-bath can exceed; the Scyths, delighted, shout for joy."[87] Classical Greeks and Romans were using cannabis, while in the Middle East, use spread throughout the Islamic empire to North Africa. In 1545, cannabis spread to the western hemisphere where Spaniards imported it to Chile for its use as fiber. In North America, cannabis, in the form of hemp, was grown for use in rope, clothing and paper.[88][89][90][91]
Yet even those who believe in this power recognize that CBD medicine remains largely unexplored: Treatments are not systematized, many products are not standardized or tested, and patients (or their parents) are generally left to figure out dosing on their own. While some suppliers and dispensaries test the CBD and THC levels of their products, many do not. “We really need more research, and more evidence,” Kogan says. “This has to be done scientifically.”
Clinical trials allow us to draw conclusions about the safety and effectiveness of potential therapeutic agents in humans, while animal studies and in vitro experiments allow researchers to explore their biological actions in greater detail. However, because the latter class of studies are not conducted in humans, the results don’t always lead to the clinical application that we hope for—the majority of drugs that start in human clinical trials never become approved. Nonetheless, animal studies provide us with a strong foundation of biological knowledge, and are where the initial breakthroughs in research are made.
THC and its major (inactive) metabolite, THC-COOH, can be measured in blood, urine, hair, oral fluid or sweat using chromatographic techniques as part of a drug use testing program or a forensic investigation of a traffic or other criminal offense.[53] The concentrations obtained from such analyses can often be helpful in distinguishing active use from passive exposure, elapsed time since use, and extent or duration of use. These tests cannot, however, distinguish authorized cannabis smoking for medical purposes from unauthorized recreational smoking.[150] Commercial cannabinoid immunoassays, often employed as the initial screening method when testing physiological specimens for marijuana presence, have different degrees of cross-reactivity with THC and its metabolites.[151] Urine contains predominantly THC-COOH, while hair, oral fluid and sweat contain primarily THC.[53] Blood may contain both substances, with the relative amounts dependent on the recency and extent of usage.[53]
A CNN program that featured Charlotte's Web cannabis in 2013 brought increased attention to the use of CBD in the treatment of seizure disorders.[67][68] Since then, 16 states have passed laws to allow the use of CBD products with a doctor's recommendation (instead of a prescription) for treatment of certain medical conditions.[69] This is in addition to the 30 states that have passed comprehensive medical cannabis laws, which allow for the use of cannabis products with no restrictions on THC content.[69] Of these 30 states, eight have legalized the use and sale of cannabis products without requirement for a doctor's recommendation.[69]
CBD has powerful effects on the liver as well. Have you ever had a prescription that warns you not to take the medicine along with grapefruit? That’s because grapefruit inhibits certain drug-metabolizing enzymes in your liver, resulting in much higher levels of your medication in your bloodstream. CBD does the same thing, so it is wise to discuss your medication regimen with a doctor or pharmacist before engaging in CBD therapy.
If you read the ingredient list, often everything in the jar is straight from mother earth. As long as that's indeed the case with the cream you have your eye on, the formula is immensely safe, chemically, says Gregory Gerdeman, Ph.D., neurophysiologist who researches cannabinoid biology and pharmacology at Eckerd College in Saint Petersburg, FL.. And since they're formulated to be topical—absorbing into the top layer of skin—and not transdermal—which would pass through the skin and into your bloodstream—there's no risk of getting high, Gerdeman explains. (P.S. Here's How Marijuana Affects Athletic Performance.)
Understanding CBD’s analgesic, or pain-relieving, interactions with the ECS can shed light on CBD’s other interactions and effects. Importantly, the ECS participates in our bodies’ pain processing, but when CBD is introduced to our ECS, it stops the body from absorbing a pain-regulating compound known as anandamide — one of our body’s’ own natural cannabinoid molecules. Inhibiting the absorption of this compound shunts excess quantities into the bloodstream that in turn reduces pain. One study has revealed that CBD targets alpha-3 (α3) glycine receptors to suppress chronic pain and inflammation associated with dysfunctional glycine receptors, which are an important target for pain processing in the spine. In both humans and animal models, CBD has been shown to have a variety of anti-inflammatory properties.

Experimental studies have also been conducted in order to assess the effect of cannabis use on schizophrenia. D’Souza et al. (2004) administered varying levels of the main ingredient in cannabis to healthy individuals with a history of cannabis exposure (but not abuse) and found that the subjects in the study displayed both positive and negative symptoms associated with schizophrenia, although all symptoms disappeared by about 3 h. D’Souza et al. (2005) conducted a follow-up study in which they followed the same protocol, but with clinically stable schizophrenia patients. Again, they found brief increases in positive symptoms, even if the patients were already taking antipsychotics.
Every animal with a spinal column has an endocannabinoid system (ECS), which scientists estimate evolved more than 600 million years ago and has been carried forward across the millennia. This ancient system—discovered through the work of several researchers between roughly 1965 and 1995—is named for Cannabis sativa L., the plant species that most dramatically affects it. Its basic functions have been summarized as to “relax, eat, sleep, forget and protect.”

The AKC Canine Health Foundation (CHF) is currently sponsoring a study, through the Colorado State University’s College of Veterinary Medicine and Biomedical Sciences, that will evaluate the use of CBD in treatment-resistant epileptic dogs. The CHF hopes that this will be the first study to gain scientific data on the use of CBD in dogs with this condition.
The results of the three large European cohort studies have been confirmed in two smaller New Zealand birth cohorts. Arsenault and colleagues (2002) reported a prospective study of the relationship between adolescent cannabis use and psychosis in a New Zealand birth cohort (n = 759). They found a relationship between cannabis use by age 15 and an increased risk of psychotic symptoms by age 26. The relationship did not change when they controlled for other drug use, but it was no longer statistically significant after adjusting for psychotic symptoms at age 11. The latter probably reflected the small number of psychotic disorders observed in the sample. Fergusson et al. (2003) found a relationship between cannabis dependence at age 18 and later symptoms that included those in the psychotic spectrum reported at age 21 in the Christchurch birth cohort. Fergusson and colleagues adjusted for a large number of potential confounding variables, including self-reported psychotic symptoms at the previous assessment, other drug use and other psychiatric disorders, but whether the association represents a link between cannabis use and psychotic symptoms specifically, or more general psychiatric morbidity, remains unclear.
Given the uncertainties and handicaps associated with hemp, it is fortunate that there are compensating factors. As noted, as a crop hemp offers some real environmental advantages, particularly with regard to the limited needs for herbicides and pesticides. Hemp is therefore pre-adapted to organic agriculture, and accordingly to the growing market for products associated with environmentally-friendly, sustainable production. Hemp products are an advertiser’s dream, lending themselves to hyperbole (“healthiest salad oil in the world,” “toughest jeans on the market”). While the narcotics image of C. sativa is often disadvantageous, advertisers who choose to play up this association do so knowing that it will attract a segment of the consuming population. In general, the novelty of hemp means that many consumers are willing to pay a premium price. It might also be said that those who have entered the hemp industry have tended to be very highly motivated, resourceful, and industrious, qualities that have been needed in the face of rather formidable obstacles to progress.
Arcadia Biosciences Inc. shares RKDA, +7.63% soared 13.7%, after the food-ingredients and nutritional-oils company said it was granted its first industrial hemp pilot progam license in Hawaii. The license allows Arcadia Specialty Genomics, the company’s cannabis-focused business unit launched last week, to begin research and cultivation of hemp, planted on 10 acres of leased land.
Outside of the aforementioned studies, CBD’s progress toward its place in society today suffered from intermittent spurts and starts until 1996 when California became the first US state to legalize medical cannabis. This groundbreaking moment paved the way for public support and lucrative research opportunities. Other states including Oregon, Alaska, Washington, Maine, Hawaii, Nevada, and Colorado would follow suit before the close of 2000.
CBD Oil refers to CBD-infused products that contain CBD suspended in an oily base, such as vegetable glycerin, hempseed oil, or another plant-derived oil. Sublingual oils are ideal because they allow for rapid absorption of CBD through the membrane under your tongue directly into your bloodstream. CBD Oils are available in both low and high doses, and droppers built into the cap make it easy to measure your proper dose. CBD Oils are the most popular kind of CBD product thanks to their ease of use and rapid effects.
Due to almost a century of misinformation about Cannabis, the distinction between Cannabis and its two primary species — hemp and marijuana — has become unclear to the many and some even consider the three plants to be one in the same. Because of this, the three terms are often used interchangeably, which has created difficulties when understanding the usage and benefits of Hemp vs Marijuana and Cannabis in general.
Hemp seeds contain virtually no THC, but THC contamination results from contact of the seeds with the resin secreted by the epidermal glands on the leaves and floral parts, and also by the failure to sift away all of the bracts (which have the highest concentration of THC of any parts of the plant) that cover the seeds. This results in small levels of THC appearing in hempseed oil and foods made with the seeds. Although most of the western hemp-growing world uses 0.3% THC as a maximum concentration for authorized cultivation of hemp plants, regulations in various countries allow only a much lower level of THC in human food products manufactured from the seeds. Currently, up to 10 ppm THC is permitted in seeds and oil products used for food purposes in Canada. In Germany, more stringent limits were set for food in 2000: 5 ppm in food oil, 0.005 ppm in beverages, and 0.15 ppm in all other foods. The US Drug Enforcement Administration published new regulations on hemp in the Federal Register on October 9th 2001 that in effect 4 months later would ban the food use of hemp in the US because any amount of THC would be unacceptable in foods (follow links at www.hempreport.com/). These proposals are currently being challenged by the hemp industry. Limits have been set because of concerns about possible toxicity and interference with drug tests (Grotenhermen et al. 1998). An extensive analysis of literature dealing with the toxicity of hemp is in Orr and Starodub (1999; see Geiwitz 2001 for an analysis). Because hemp food products are considered to have great economic potential, there is considerable pressure on the hemp industry in North America to reduce THC levels.
Hemp seeds can be eaten raw, ground into hemp meal, sprouted or made into dried sprout powder. Hemp seeds can also be made into a liquid and used for baking or for beverages such as hemp milk and tisanes.[15] Hemp oil is cold-pressed from the seed and is high in unsaturated fatty acids.[16] The leaves of the hemp plant, while not as nutritional as the seeds, are edible and can be consumed raw as leafy vegetables in salads, and pressed to make juice.[17]
The Cannabis plant has a history of medicinal use dating back thousands of years across many cultures.[111] The Yanghai Tombs, a vast ancient cemetery (54 000 m2) situated in the Turfan district of the Xinjiang Uyghur Autonomous Region in northwest China, have revealed the 2700-year-old grave of a shaman. He is thought to have belonged to the Jushi culture recorded in the area centuries later in the Hanshu, Chap 96B.[112] Near the head and foot of the shaman was a large leather basket and wooden bowl filled with 789g of cannabis, superbly preserved by climatic and burial conditions. An international team demonstrated that this material contained tetrahydrocannabinol, the psychoactive component of cannabis. The cannabis was presumably employed by this culture as a medicinal or psychoactive agent, or an aid to divination. This is the oldest documentation of cannabis as a pharmacologically active agent.[113]

Yet, even with this progress, hemp businesses seem to face difficulty expanding in the US as they face challenges in traditional marketing and sales approaches. According to a case study done by Forbes, hemp businesses and startups have had difficulty marketing and selling non-psychoactive hemp products, as some online advertising platforms and financial institutions do not distinguish between hemp and marijuana.[105]
Due to the influence of big pharma,the FDA has refused (until recently) to investigate the benefits of phytocannabinoid oil for humans or pets. We are not allowed to say or imply that phytocannabinoid has any medical benefits, however the 1st Amendment also protects our right to tell you about our experiences with phytocannabinoid helping our own pets, and the fact that there have been more than 1500 clinical studies regarding the effectiveness of phytocannabinoids.*The owners and staff of Innovet believe, but cannot legally claim or imply, that countless dogs and cats have used phytocannabinoid oils for many conditions.

“There’s a lot of hype about everything about CBD,” Dr. Orrin Devinsky, the director of the NYU Langone Comprehensive Epilepsy Center, told The New York Times. “There is certainly data that it has a variety of anti-inflammatory effects, but whether that translates into improving human health is unknown. Does it help people with eczema, rheumatoid arthritis or ulcerative colitis? We don’t know. There is a good theoretical basis, but the studies have not been done.”


I assume this is also a side effect of the eased anxiety, but I seem to fall asleep within the 20- to 30-minute range rather than my normal 45 minutes to one hour (or longer). Not only do I seem to be skipping (or at least shortening) the whole tossing-and-turning phase of my sleep cycle, but I'm able to snap out of the overthinking mindset that often keeps me up at night. Of course, there's no telling whether a big life event would kindly disrupt this newfound bliss, but I'd like to think it's helped on day-to-day basis.
Although banned by federal law, measurable doses of potent CBD-rich cannabis remedies are available in many non-smokable forms and can be utilized in various ways. The time of onset and duration of effect vary depending on the method of administration. CBD-rich cannabis oil products can be taken sublingually, orally (as edibles, lozenges, beverages, tinctures, and gel caps), or applied topically.
Until recent times, the cultivation of hemp primarily as an oilseed was largely unknown, except in Russia. Today, it is difficult to reconstruct the type of plant that was grown there as an oilseed, because such cultivation has essentially been abandoned. Oilseed hemp cultivars in the modern sense were not available until very recently, but some land races certainly were grown specifically for seeds in Russia. Dewey (1914) gave the following information: “The short oil-seed hemp with slender stems, about 30 inches high, bearing compact clusters of seeds and maturing in 60 to 90 days, is of little value for fiber production, but the experimental plants, grown from seed imported from Russia, indicate that it may be valuable as an oil-seed crop to be harvested and threshed in the same manner as oil-seed flax.” Most hemp oilseed in Europe is currently obtained from so-called “dual usage” plants (employed for harvest of both stem fiber and seeds, from the same plants). Of the European dual-usage cultivars, ‘Uniko B’ and ‘Fasamo’ are particularly suited to being grown as oilseeds. Very recently, cultivars have been bred specifically for oilseed production. These include ‘Finola,’ formerly known as ‘Fin-314’ (Fig. 6) and ‘Anka’ (Fig. 7), which are relatively short, little-branched, mature early in north-temperate regions, and are ideal for high-density planting and harvest with conventional equipment. Dewey (1914) noted that a Turkish narcotic type of land race called “Smyrna” was commonly used in the early 20th century in the US to produce birdseed, because (like most narcotic types of Cannabis) it is densely branched, producing many flowers, hence seeds. While oilseed land races in northern Russia would have been short, early-maturing plants in view of the short growing season, in more southern areas oilseed landraces likely had moderate height, and were spaced more widely to allow abundant branching and seed production to develop. Until Canada replaced China in 1998 as a source of imported seeds for the US, most seeds used for various purposes in the US were sterilized and imported from China. Indeed, China remains the largest producer of hempseed. We have grown Chinese hemp land races, and these were short, branched, adapted to a very long growing season (i.e. they come into flower very slowly in response to photoperiodic induction of short days in the fall), and altogether they were rather reminiscent of Dewey’s description of Smyrna. Although similar in appearance to narcotic strains of C. sativa, the Chinese land races we grew were in fact low in intoxicating constituents, and it may well be that what Dewey thought was a narcotic strain was not. Although some forms of C. sativa have quite large seeds, until recently oilseed forms appear to have been mainly selected for a heavy yield of seeds, usually recognizable by abundant branching. Such forms are typically grown at lower densities than hemp grown only for fiber, as this promotes branching, although it should be understood that the genetic propensity for branching has been selected. Percentage or quality of oil in the seeds does not appear to have been important in the past, although selection for these traits is now being conducted. Most significantly, modern selection is occurring with regard to mechanized harvesting, particularly the ability to grow in high density as single-headed stalks with very short branches bearing considerable seed.
Tocopherols. Tocopherols are major antioxidants in human serum. Alpha- beta-, gamma- and delta-tocopherol represent the vitamin E group. These fat-soluble vitamins are essential for human nutrition, especially the alpha-form, which is commonly called vitamin E. About 80% of the tocopherols of hempseed oil is the alpha form. The vitamin E content of hempseed is comparatively high. Antioxidants in hempseed oil are believed to stabilize the highly polyunsaturated oil, tending to keep it from going rancid. Sterols in the seeds probably serve the same function, and like the tocopherols are also desirable from a human health viewpoint.
The mosaic of laws that govern CBD legality across the globe varies just as much as the legislation across the US. Generally, CBD extract is legal in most countries, but what makes it illegal is where and what it’s extracted from. Most Group of 20 (G20) countries allow CBD extracted from industrial hemp, but not CBD extracted from whole-plant marijuana. Note, however, the differences between the two. Legislation regarding international travel with CBD also varies among countries. For the foreseeable future, the best practice would be to search online, or contact the respective embassies or consulates, before traveling to determine whether your CBD is safe and legal.
An alternative to the gateway hypothesis is the common liability to addiction (CLA) theory. It states that some individuals are, for various reasons, willing to try multiple recreational substances. The "gateway" drugs are merely those that are (usually) available at an earlier age than the harder drugs. Researchers have noted in an extensive review that it is dangerous to present the sequence of events described in gateway "theory" in causative terms as this hinders both research and intervention.[271]
Even more intriguing: CBD also influences many non-cannabinoid receptor systems in the brain, interacting with receptors sensitive to a variety of drugs and neurotransmitters (Figure 2). These include opioid receptors, known for their role in pain regulation. Opioid receptors are the key targets of pharmaceutical pain killers and drugs of abuse such as morphine, heroin, and fentanyl. CBD can also interact with dopamine receptors, which play a crucial role in regulating many aspects of behavior and cognition, including motivation and reward-seeking behavior.
CBDMEDIC™ is the first and only family of topical medications that combines advanced science, active pharmaceutical ingredients (menthol and camphor) and CBD hemp extract Cannabis sativa L (THC-free and non-psychoactive) with the finest organic and natural ingredients. Our products are produced using advanced technology with a mission to provide fast, strong and long-lasting pain relief.
Another notable study conducted by Mechoulam was done on mice bred to have a version of type-1 diabetes. The diabetes was designed to manifest right around 14 weeks, so the mice were treated with CBD for the first 7 weeks of their life and then again in another 7 weeks. He concluded that only 30% had developed diabetes compared to the 90-100% given the placebo.
• The results of a study led by Dr. Joe Wakshlag, associate professor and section chief of nutrition at Cornell, currently under review for publication, also contribute to the knowledge bank. According to the abstract, its objectives were to “determine the basic oral pharmacokinetics, determine safety and assess efficacy of CBD oil in managing pain in dogs with osteoarthritis.” The Canine Brief Pain Inventory and Hudson activity scores reportedly showed a clinically significant reduction in pain and an increase in activity with CBD treatment.

Cannabis use started to become popular in the United States in the 1970s.[252] Support for legalization has increased in the United States and several U.S. states have legalized recreational or medical use.[282] A 2018 Social Science Research study found that the main determinants of such changes in attitudes toward marijuana regulation since the 1990s were changes in media framing of marijuana, a decline in perception of the riskiness of marijuana, a decline in overall punitiveness, and a decrease in religious affiliation. [283]
Cannabidiol is POSSIBLY SAFE when taken by mouth or sprayed under the tongue appropriately. Cannabidiol in doses of up to 300 mg daily have been taken by mouth safely for up to 6 months. Higher doses of 1200-1500 mg daily have been taken by mouth safely for up to 4 weeks. A prescription cannabidiol product (Epidiolex) is approved to be taken by mouth in doses of up to 10-20 mg/kg daily. Cannabidiol sprays that are applied under the tongue have been used in doses of 2.5 mg for up to 2 weeks.
Cannabidiol has been found to act as an antagonist of GPR55, a G protein-coupled receptor and putative cannabinoid receptor that is expressed in the caudate nucleus and putamen in the brain.[31] It has also been found to act as an inverse agonist of GPR3, GPR6, and GPR12.[12] Although currently classified as orphan receptors, these receptors are most closely related phylogenetically to the cannabinoid receptors.[12] In addition to orphan receptors, CBD has been shown to act as a serotonin 5-HT1A receptor partial agonist,[32] and this action may be involved in its antidepressant,[33][34] anxiolytic,[34][35] and neuroprotective effects.[36][37] It is an allosteric modulator of the μ- and δ-opioid receptors as well.[38] The pharmacological effects of CBD have additionally been attributed to PPARγ agonism and intracellular calcium release.[7]

Our award-winning support staff, experienced cultivators, and network of healthcare practitioners are here to help remove barriers to medical cannabis. We’re honoured to be part of a movement that’s helping Canadians across the country access their medicine; and as we grow we will continue to provide patients with reliable access to safe, consistent, and effective medical cannabis.
While normally I'd be slightly tripped up by little things like an overly crowded subway car or a full inbox at work, the CBD oil seems to have taken the edge off of my anxiety a bit. Rather than overthinking a sternly worded email or analyzing a social interaction, I've found it easier to recognize the irrationality of these thoughts and actually let them go (instead of ruminating on the situation). In some ways, I feel more like myself. With that said, I've still experienced some social anxiety when meeting new groups of people—I'd be interested to see what taking the full recommended dose would do.
Fig. 8. Scanning electron micrographs of the abaxial surface of a perigonal bract (which envelops the fruit). These bracts are the most intoxicating part of the plant, and may contain 20% THC, dry weight. The resin is synthesized both in stalked and sessile glands. Multicellular secretory glands (of phallic appearance), some broken stalks of these (note cellular appearance), and unicellular cystolith hairs (claw-like structures) are pictured. Fig. 9. Some important cannabinoids of cannabis resin. D9-THC (delta-9 tetrahydrocannabinol) is the chief intoxicant chemical and predominates in intoxicant strains, while the isomer D8-THC is usually present in no more than trace amounts. CBD (cannabidiol) is the chief non-intoxicant chemical, and predominates in non-intoxicant strains; it has sedative effects. The non-intoxicant CBN (cannabinol) is a frequent degradation or oxidation product. The non-intoxicant cannabichromene (CBC) is typically found in trace amounts in intoxicant strains. The non-intoxicant cannabigerol (CBG) is considered to be a precursor of the other cannbinoids (see Fig. 10).
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