Publication: Kakteen Südamerika 2: 626, fig. 1980
Description
Usually solitary globular cactus, up to 18 cm in diameter.
Stem: Flattened globose, green, 12-18 cm in diameter
Ribs: 16-21, sharply notched, to 1.8 cm high
Areoles: Sunken, whitish, to 2 cm apart.
Spines: Light yellow to dark brown.
Central spines: 4-10, straight or curved, 2.5-6 cm long.
Radial spines: 12-20, needle-like, 1.5-4 cm long.
Flowers: Nocturnal, broad funnelform, white to pink, up to 19 cm long.
Fruits: Green, to 4 cm long and 3 cm in diameter.
Origin and Habitat
Bolivia Cinti province, (Chuquisaca) at high elevation
Cultivation and Propagation
The Echinopsis hystrichoides is a summer grower species that offers no cultivation difficulties. Water regularly in summer (but do not overwater ) needs good drainage and very porous soil, keep rather dry in winter. Feed with a high potassium fertilizer in summer. It is quite frost resistant if kept dry (hardy to -10° C). Need a bright exposure, full sun or half shade in summer.
Propagation: Direct sow after last frost, offsets.
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