Maihuenia poeppigii, commonly known in Chile as maihuén or hierba del guanaco, is a succulent cactus shrub from Argentina of a type called a cushion plant. The flowers and fruit are yellow. M. poeppigii is remarkably tolerant to moisture and cold temperatures.
The specific epithet poepigii commemorates Eduard Pöppig, a 19th-century German naturalist who explored South America.
This is a cactus species forming dense cushions often consisting of hundreds of individual segments. The plant's specific physical characteristics are listed below: