A strain is a specific variety of a plant species. Strains are developed to produce distinct desired traits in the plant and are usually named by their breeders (or by creative consumers). Strain names often reflect the plant’s appearance, its promised buzz, or its place of origin. Although the medical marijuana industry strives for consistency, strains can easily be mistakenly or purposely misidentified.THC is an abbreviation for tetrahydrocannabinol. It is the most well-known and most abundantly available cannabinoid in marijuana plants. THC is also the component in marijuana that is responsible for the psychoactive effects, or the “high.” Also known as delta-9-tetracannabinol, it was first isolated in 1964 and is thought to serve as a natural defense for the plant against pests. Research has shown THC to be an effective medical treatment for a range of conditions. There is no lethal dose of the compound in its natural form.Weed is a slang term for marijuana.About the PlantA backcross is a hybrid plant that has been bred with one of its parents (or a plant that is genetically similar) in order to create offspring that is closer to that of the original parent. For example, a grower could breed a plant with its own father to make sure the baby has its dad’s height. This is often done to maintain rarer strains or strengthen those with desired recessive genes.This refers to a clipping from a cannabis plant, which can then be rooted and grown through a cloning process of the mother plant, from which the clone was cut.A cross (referring to crossbreeding) is the result when two different plant strains are bred together. For example, Blue Dream is a cross between Blueberry and Haze strains.Feminized plants come from seeds that have been selectively bred to produce only female plants. Since female plants are the ones that produce flowers (which is where most of cannabis’ cannabinoids are found), they are the only ones that are used to create marijuana products. Feminized seeds are intended to make things easier for growers by eliminating the need to determine the sex of growing plants and remove males early on to prevent fertilization. Generally, feminized seeds produce the same quality of plants as naturally produced seeds.Flowering time refers to the time it takes for a plant to produce mature flowers. Cannabis flowering times are affected by the length of daily exposure the plant receives to sun (with the exception of the Cannabis ruderalis species, which flower automatically). When flowering times are reported for a strain, they are general estimates based on how the plants do on average in optimal conditions. Actual flowering times will vary and it is up to the grower to decide when to harvest for maximum benefit.You probably know what flowers are; they’re often the “pretty” part of a plant, and the same is true for cannabis. While cannabis flowers don’t have traditional petals or look like daisies, they are still the reproductive organ of the female plants. Cannabis flowers are the hairy, sticky, crystal-covered bits that are harvested and dried to be used as medication. When they are allowed to be fertilized by male plants, these flowers will produce cannabis seeds. If not, they will continue to produce the resin that contains their active cannabinoids until they are harvested or begin to die.An heirloom refers to a cannabis strain that was taken from its native homeland and propagated in another geographical location.Hydroponics refers to a system of gardening that does not use soil. Plants are grown in water and receive their nutrients from the addition of solutions rather than soil. For growers, hydroponic advantages include more control over nutrient intake and stability. In terms of marijuana production, plants grown hydroponically are sometimes said to have cleaner, more distinct flavors.Kush refers to a line of cannabis plants that hail from the Hindu Kush mountains in Afghanistan and Pakistan. Kush strains are indicas and have a unique aroma that have given them a large fan base. Specific breeds and plants are unique, but their aroma is generally described as “earthy” and often piney combined with citrus or sweet.A landrace refers to a local variety of cannabis that has adapted to the environment of its geographic location. This accounts for genetic variation between landrace strains, which have been crossbred to produce the cannabis variety we see today. Landrace strains are oftentimes named after their native region, like Afghani, Thai, and Hawaiian, and traces of landraces are sometimes detectable in the names of their crossbred descendants.OG is a term that’s now used to describe many strains, though the term originated to describe Southern California’s Ocean Grown Kush, which was quickly shortened to OG Kush. OG Kush grew quickly in fame and reputation. Most OGs are different variations of the original OG Kush genetics or are also ocean grown on the West Coast.Phenotype is a term that is heard most often in growing. It refers to the general physical characteristics of the plant such as height, color, branching, leaf configuration down to cell structure—any markers that can be used to identify and judge the healthiness of a plant.Pistils are part of a female plant’s anatomy. On cannabis, it’s identified as the little hair-like extensions on the flowers that range in color from white to red to darker orange-brown. When plants are going to be fertilized, the pistil acts to collect the male pollen. When plants are left unfertilized, as in the case of marijuana, the pistils change and can be indicators of plant ripeness.