Tripping horses long puzzled scientists. Turns out, the seeds of Sleepy grass (Stipa robusta) grow a fungus that may contain the highest concentrations of lysergic acid amides—a close cousin of LSD—found in nature.

The Mexican Prickly Poppy has long been associated with the ancient Aztec god Tlaloc, whose worshippers ingested a psychoactive preparation of the seeds to enter the dream realm. Today, the plant has found use as a cannabis substitute and enjoyed for its euphoric and aphrodisiac effects.

Native tribes have used peyote for thousands of years, and the shamanic ritual has spread to intrepid juggernauts seeking the visionary wisdom of the land. But did you know that more than 150 other species of cacti contain mescaline or similar shamanic compounds? Get ready to travel great distances with this backyard entheogen.

The Hawaiian Baby Woodrose (Argyreia nervosa) may hold the honour of containing the highest concentrations of lysergic acid amides found in nature. This LSD-like heavy hitter isn't a rose at all but is related to the morning glory family—well known by psychonauts for its hallucinogenic properties. Set yourself adrift on Nature's LSD trip!

Calamus, long associated with euphoria, love and lust, is an ancient Native American entheogen producing an MDA-like high. Commonly known as sweet flag or bitterroot, the dried rhizomes are chewed to combat fatigue or smoked with cannabis for a truly divine hallucinogenic experience. Discover more about Acorus americanus and revel in the psychoactive effects of this flowering wetland plant.