Sinicuichi
Not much is known of the use of sinicuichi (alternate spelling sinicuiche) among the Aztecs. R. Gordon Wasson identified the flower on the statue of Xochipilli and suggested from its placement with other entheogens that it was probably used in a ritualistic context. Multiple alkaloids have been isolated from the plant; with cryogenine, lythrine, and nesodine being the most important.
Sinicuichi could be the plant tonatiuh yxiuh "the herb of the sun" from the Aztec Herbal of 1552. tonatiuh means sun. This is interesting because today in Central and South America, sinicuichi is often called abre-o-sol, or the "sun opener." Tonatiuh yxiuh is described as being a summer blooming plant, as is Heimia.
The Herbal also includes a recipe for a potion to conquer fear. It reads:
Let one who is fear-burdened take as a drink a potion made of the herb tonatiuh yxiuh which throws out the brightness of gold.
One of the effects of sinicuichi is that it adds a golden halo or tinge to objects when ingested.
Read more about this topic: Aztec Use Of Entheogens