Maihueniopsis hickenii is a cushion-forming, low-growing succulent shrub belonging to the Cactaceae family, highly adapted to the harsh conditions of Patagonia 1. It is known for its remarkable cold tolerance and compact growth habit.

Classification and naming

The species belongs to the genus Maihueniopsis. The specific epithet \"hickenii\" honors the prominent Argentine botanist Cristóbal María Hicken. It has historically been classified under Opuntia due to its segmented growth, but phylogenetic studies place it firmly within Maihueniopsis ².

Distribution and habitat

This species is native to southern Argentina, particularly in the Patagonian provinces of Santa Cruz, Chubut, and Río Negro ¹. It thrives in arid, wind-swept gravelly plains and rocky slopes at moderate to high elevations, enduring extreme temperature fluctuations.

Appearance

It forms dense, flat cushions composed of small, egg-shaped to cylindrical segments. The segments are dull greyish-green, bearing prominent areoles with sturdy, yellowish-brown, flattened spines. In late spring or summer, it produces beautiful, bright yellow cup-shaped flowers at the branch tips.

Cultivation and care

In cultivation, Maihueniopsis hickenii requires full sun and exceptionally well-drained, mineral-rich soil ². Given its Patagonian origin, it is extremely cold-hardy, tolerating temperatures down to -15°C, provided the substrate is kept entirely dry during the winter resting period. Watering should be deep but infrequent in summer.

Common cultivation mistakes

The most common pitfall is overwatering, especially during winter. A combination of cold temperatures and wet soil quickly leads to root and stem rot. Insufficient sunlight will cause weak, elongated growth.