Sativa represents a sub-class that shows itself to be found in equatorial to temperate zones, it can be a tropical variety that is long season (typically found in Asia, the tropics and in the new world). These plants typically take 8-12 months in an outdoor setting to finish. The plant grows to tree like proportions and in some localities can even be treated as perrenial. The flowers are slow maturing and the high is typically centered in the "Head", I have read that Sativa types affect the cerebellum, lending themselves to be more of a "head" than "body" stone.

Cannabis Indica is a type that is typically found in harsher conditions, such as higher elevation and a wide range of temperature levels. The plant structure stays squat and compact (yet can be big depending on genetics), designed for high elevation and resistant to wind and cold. Buds tend to be resistant to pests and foliar problems, making them ideal for outdoor. The flowers have a quick build up, and typically finish in 3-5 months in an outdoor setting, and is treated as an annual. The flowers show trichomes very early in bud development, and the high is associated with a more "body" buzz, lending some to believe that this type is superior for medicinal applications. Quality landrace strains of Indica typically come from the middle east, like Afghanistan, Lebanon, and even India.

Ruderalis is a newly classified, yet disputed distinction of Cannabis. It has been known to be from the norhern Russian Continent and surrounding environs. It is known as an "auto-flowering" type, due to it's origin locality, it provides a very short grow season, which in turn makes for a quick growing type. Some dispute if this is just an Indica or Sativa that is just mis-classified.

I have no experience with the latter.

reference: personal experience, and reading hightimes

im curious as to where you are getting your info.

You've just discoursed some very interesting details

Never heard of cannabis playing a role in human development.. Where did you come across such intriguing information?

I definitely began to wonder the exact same question during my early high-school days. But after doing my own research, I began to form an idea of its origin, and one that brought understanding to the amazing potential of Cannabis Sativa.

What does Sativa, Indica, and Ruderalis mean to you?