The Inca Stargazer mushroom is known to originate at the foothills of the Andes Mountains, most notably around the Inca ruins at Machu Picchu. While one of the oldest known p. cubensis varieties, it has become one of the rarest over time. Their caps are between one and two inches, convex in shape, changing from reddish-brown to golden brown to light yellow as they mature. They predominately grow in clumps on slender cylindrical stems atop of dense rhizomorphs (thick root-like mycelium structures), on decomposing wood in grassy conifer forests.