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:

• Leaves: Small and succulent.
• Flowers: Showy, large, satiny and lemon-yellow in color. It flowers in late spring.
• Fruit Small, round and yellow.