From the 'Chronic' article:
Salvia divinorum is a bright, leafy green plant from Mexico that when chewed or smoked causes intense hallucinations comparable to LSD or "magic mushrooms."
And it's legal in California.
The drug is available all over the Bay Area, mostly in smoke shops and herbal stores. It's also sold over the Internet. For $15 to $50 a hit, users get a high that sends them into a dream-like state for anywhere from a few minutes to an hour or two.
Link to article. Thanks to Brady for turning me on to this.