Salvia is not the flower part of a marijuana plant - the first answer is wrong.
Salvia is the short name for Salvia divinorum, also known as Diviner’s Sage. It is a member of the sage genus and the Lamiaceae (mint) family. The Latin name Salvia divinorum literally translates to “sage of the seers”.
It is a psychoactive herb which can induce strong dissociative effects. The plant is found in isolated, shaded, and moist plots in Oaxaca, Mexico. It grows to well over a meter in height. It has hollow square stems, large green leaves, and occasional white and purple flowers.
It remains legal in most countries and, within the United States, is legal in the majority of states. However, some have called for its prohibition. Most proposed bills have not been made into law, with motions having been voted down in committee, failed, died, or otherwise stalled.
There are various attempts to make it illegal but these compare it to LSD (poorly) and it may actually be a good idea for it to remain legal because it may actually help people deal with drug addictions. Salvia divinorum can be chewed, smoked, or taken as a tincture to produce experiences ranging from laughter to much more intense and profoundly altered states. The duration of effects is much shorter than that of other, more well-known psychoactive compounds; the effects of smoked Salvia typically last for only a few minutes. The most commonly reported after-effects include an increased feeling of insight, an improved mood, a sense of calmness, and an increased sense of connection with nature—though, much less often, it may also cause dysphoria (unpleasant or uncomfortable mood).
It has been around for thousands of years.