According to Workman (www.shroomery.org):
"The Huautla strain of Psilocybe cubensis is a recent collection from the wilds of southern Mexico in the region of Oaxaca near the village of Huautla de Jimenez. Huautla de Jimenez has gained notoriety as the hometown of mushroom shaman Maria Sabina.
In 1954 Gordon Wasson and Allan Richardson became the first Caucasians to participate in a mushroom ceremony, conducted under the guidance of Maria Sabina near the village of Huautla de Jimenez. Wasson and Richardson each consumed specimens of Psilocybe caerulescens var. mazatecorum."