Friday, 13 June 2014

Cannabis Indica

Cannabis indica


Cannabis indica
Row(Purple Kush).jpg
Scientific classification
Kingdom:Plantae
Subkingdom:Viridaeplantae
Superdivision:Streptophyta
Division:Tracheophyta
Subdivision:Spermatophyta
Class:Magnoliopsida
Superorder:Rosanae
Order:Rosales
Family:Cannabaceae
Genus:Cannabis
Species:Cannabis sativa
Subspecies:Cannabis sativa ssp. indica
Binomial name
Cannabis indica
Lam.
Cannabis indica, formally known as Cannabis sativa forma indica, is an annual plant in the Cannabaceae family. A putative species of the genus Cannabis, it is typically distinguished from Cannabis sativa.[1][2]

Taxonomy

In 1785, Jean-Baptiste Lamarck published a description of a second species of Cannabis, which he named Cannabis indica. Lamarck based his description of the newly named species on plant specimens collected in India. Richard Evans Schultes described C. indica as relatively short, conical, and densely branched, whereas C. sativa was described as tall and laxly branched.[3] Loran C. Anderson described C. indica plants as having short, broad leaflets whereas those of C. sativa were characterized as relatively long and narrow.[4][5] Cannabis indica plants conforming to Schultes's and Anderson's descriptions may have originated from the Hindu Kush mountain range. Because of the often harsh and variable (extremely cold winters, and warm summers) climate of those parts, C. indica is well-suited for cultivation in temperate climates..[citation needed]

Cultivation

Broad-leafed Cannabis indica plants in India, Afghanistan, Bangladesh and Pakistan are traditionally cultivated for the production of hashish. Pharmacologically, C. indica landraces tend to have a higher cannabidiol (CBD) content than C. sativa strains.[6] Most commercially available indica strains have been selected for low levels of CBD, with some users reporting more of a "stoned" feeling and less of a "high" from C. indica when compared to C. sativa.[7]The Cannabis indica high is often referred to as a "body buzz" and has beneficial properties such as pain relief in addition to being an effective treatment for insomnia and an anxiolytic, as opposed to sativa's more common reports of a "spacey" and mental inebriation, and even, albeit rarely, comprising hallucinations.[8]Differences in the terpenoid content of the essential oil may account for some of these differences in effect.[9][10] Common indica strains for recreational or medicinaluse include Kush and Northern Lights.
A recent genetic analysis included both the narrow-leaflet and wide-leaflet drug "biotypes" under C. indica, as well as southern and eastern Asian hemp (fiber/seed) landraces and wild Himalayan populations.[11]

Difference between C. indica and C. sativa

Cannabis indica has a higher ratio of CBD:THC compared to Cannabis sativa.[12][dubious ] Cannabis strains with relatively high CBD:THC ratios are less likely to induce anxiety than vice versa. This may be due to CBD's antagonistic effects at the cannabinoid receptors, compared to THC's partial agonist effect. CBD is also a 5-HT1A receptor (serotonin) agonist, which may also contribute to an anxiolytic-content effect.[13] This likely means the high concentrations of CBD found inCannabis indica mitigate the anxiogenic effect of THC significantly.[13] The effects of sativa are well known for its cerebral high, while indica is well known for its sedative effects which some prefer for night time use.[13] Both types are used as medical cannabisIndica plants are normally shorter and stockier than sativas. They have wide, deeply serrated leaves and a compact and dense flower cluster.

Genome

In 2011, a team of Canadian researchers announced that they had sequenced a draft genome of the Purple Kush variety of C. indica.[14]

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