Firt

YOU: But officer, it must've been my gardener who planted it.

OFFICER: Oh yeah? It was your gardener who tipped us off that it was here.

YOU: There's your proof. He's always hated me.

The only way you'll get out of this one is if you can prove that your gardener is a communist or gets a lot of speeding tickets.

From A Child's Garden of Grass by Jack S Margolis and Richard Clorfene 1969

With such large quantities of marijuana entering the United States through Mexico, plus the fact that "marijuana" is a Spanish word, one might suppose that the plant itself is mexican in origin. This, however, is not the case. Marijuana became established at a fairly early time in history into the folk medicine of Mexico, but it probably originated in a very remote time the past in the Near East.

Because marijuana is very commonly used both in Mexican folk medicine and in Mexican sorcery...

From Secrets of the Mind-Altering Plants of Mexico by Richard Heffern 1974

But it would be unfair to suggest that the underground is only concerned with cannabis and drugs. It is a genuine protest against present-day materialist values, with a special interest in the mystical elements of life. Leech (1969) in a Christian analysis of this sub-culture writes: 'It is a serious movement with a concern for new values based on love, and it has brought about what can only be described as a new spirituality.'

From The Strange Case of Pot by Michael Schofield 1971

MANDRAKE

Mandragora officinarum L. Family Solanaceae (Potato family).
Material: Various parts especially parsnip-shaped root of perennial plant found in fields and stony places of southern Europe.
Usage: Brew made from boiling crushed root.
Active Constituents: Scopolamine, hyoscyamine, mandragoine and other tropanes.
Effects: Hallucinations followed by deathlike trance and sleep.
Contraindications: Same as thornapple. Said to cause insanity. Not recommended.
Supplier: Must be obtained in Europe.

From Legal Highs by Adam Gottlieb 1973