Habitat: foggy coastal deserts of Peru. Description: a genus of yellow or green-spined cacti with upright or
sprawling habit, usually branching. The nocturnal flowers come in a variety
of colours. Soil: basic mix. Location: grow in filtered light when young, in full sun older
specimens. Temperature: the minimum temperature should stay around 8-10°C
(46-50°F). Water: average. Cultivation tips: cold temperatures are harmful to these slow-growing
cacti. Main species: H. decumbens; H. aureispinus; H. chrysacanthus;
H. laradensis; H. tenuis; H. repens; H. pseudomelanostele; H. versicolor.