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'''Cannabis''' is a [[genus]] of [[flowering plant]] that includes one or more species. The plant is believed to have originated in the mountainous regions just north-west of the [[Himalayas]]. It is also known as '''[[hemp]]''', although this term usually refers to varieties of ''Cannabis'' cultivated for non-drug use. ''Cannabis'' plants produce a group of chemicals called [[cannabinoids]] which produce mental and physical effects when consumed. As a [[drug]] it usually comes in the form of dried flowers and leaves, [[resin]] ([[hashish]]), or various extracts.<ref>[http://www.erowid.org/plants/cannabis/cannabis_basics.shtml Cannabis Basics]</ref>. In the early 20th century, it became illegal in most of the world to cultivate or possess ''Cannabis'' for drug purposes. When consumed for its mental and physical effects, cannabis is usually smoked (though it may also be ingested), immediately drawing parallels to [[nicotine]] cigarettes. Unlike [[nicotine]] smoke, however, which is widely recognized as containing many carcinogenic chemicals, the carcinogenic nature of cannabis smoke is widely disputed, and many suggesting that any cancer-causing agents present in the smoke are in no way specific to cannabis but instead present as a result of the incomplete incineration of organic matter*.
* Some people have come to believe that regular usage of Cannabis can help prevent some types of cancer, and others think that it neither causes or prevents cancer it can also funnyly enough stop alzimers diesase ,it is also the only medication to ease glycoma.
== Species ==
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In 1976, Ernest Small and [[Arthur Cronquist]] proposed a classification comprising a single species ''Cannabis sativa'' L, with two subspecies: ''C. sativa'' L subsp. ''sativa'' and ''C. sativa'' L subsp. ''indica'' (Lam). According to this concept, ''C. sativa'' subsp. ''sativa'' was [[Artificial selection|selected]] for traits that enhance fiber or seed production and has low levels of the psychoactive [[Tetrahydrocannabinol|delta-9-tetrahydrocannabinol (THC)]], whereas ''C. sativa'' subsp. ''indica'' was primarily selected for drug production and has relatively high levels of THC. Within these subspecies they described ''C. sativa'' L subsp. ''sativa'' var. ''spontanea'' (Vav.) as a wild or escaped type of low-intoxicant ''Cannabis'', and described ''C. sativa'' L subsp. ''indica'' var. ''kafiristanica'' (Vav.) as a wild or escaped variety of the high-intoxicant type. <ref name="small1976a"/>. This classification was based on several factors, including interfertility, chromosome uniformity, systematic chemotype analysis, and numerical analysis of diagnostic characters. <ref name="small1976a"/> <ref name="small1976b"> {{cite journal | title=A Numerical Taxonomic Analysis of Cannabis with Special Reference to Species Delimitation | last=Small | first=Ernest | coathors=Perry Y. Jui, L. P. Lefkovitch | journal = Systematic Botany | volume=1 | issue= 1 | date=1976 | pages= pp. 67-84 }} </ref>. <ref name="small1973"/> Ernest Small was awarded the G. M. Cooley Prize by the American Association of Plant Taxonomists for his work involving ''Cannabis.'' <ref>{{cite web | url=http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_gene_e?mlist-authors-small_e.html | publisher=National Research Council Canada | title=Ernest Small (biography) | accessdate=2006-10-28 }} </ref>
== Headline text ==
i love weed '''Bold text'''i relly love head
=== Ongoing research ===
[[Molecular biology|Molecular analytical techniques]] developed in the late twentieth century are being brought to bear on questions of scientific classification. This has resulted in many reclassifications based on [[History of plant systematics#Evolutionary systematics|evolutionary systematics]]. Scientific classification of ''Cannabis'' has been investigated using molecular biology and genetic techniques.
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