When it comes to Cannabis species classification there is much heated debate. Some say that Sativa and Indica don't exist and it is all Sativa. Some say they are seperate species, some say they are subspecies of Sativa (
Cannabis sativa ssp. sativa and
Cannabis sativa ssp. indica). Recently there was a genetic comparison done of plants from different parts of the world and the results were that there is indeed three species.
Cannabis sativa (which has no drug qualities at all),
Cannabis indica (which would be what we all arbitrarily divide into Sativa and Indica based on morphology and high), and
Cannabis rasta (a stronger drug type cannabis). Ruderalis is a disputed species that autoflowers (no matter how much light or darkness it gets it autoflowers at x weeks) and tends to be of lesser quality for drug use. Ruderalis is crossbred with indicas (our indica/sativas) to get plants such as Early Pearl or Ruderalis Skunk.
Here's the article about the Rasta:
http://www.newscientist.com/article.ns? ... 725175.200
Here is the article in whole:
Rasta lends its name to a third type of cannabis
20 September 2005
AS POLICE and dope smokers know, there are two types of cannabis. Cannabis sativa sativa is mainly used to make hemp, while the indica subspecies is prized for its tetrahydrocannabinol (THC) content, which produces the "high". But now Australian researchers have discovered a third type of cannabis, called rasta.
Simon Gilmore of the Canberra Institute of Technology catagorised 196 sample plants according to the DNA in their mitochondria and chloroplasts. The samples included plants grown for drugs and hemp as well as wild varieties from Europe, Asia, Africa, Mexico and Jamaica.
The results showed three distinct "races" of cannabis. In central Asia the THC-rich indica predominated, while in western Europe sativa was more common. In India, south-east Asia, Africa, Mexico and Jamaica the rasta variant predominated. It looks similar to the sativa subspecies, but generally contains higher levels of THC.
Since the study was of DNA rather than a formal taxonomic study, Cannabis sativa rasta is not yet an official new subspecies: the name was the result of a competition in Gilmore's lab. Their work is expected to appear in the journal Forensic Science International later this year.
From issue 2517 of New Scientist magazine, 20 September 2005, page 12
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