Eriosyce aurata
| Light | Bright light to full sun once established |
|---|---|
| Water | Moderate in growth, sparingly; keep dry and cool in winter |
| Soil | Gritty, fast-draining mineral mix (see Soil and potting mix) |
| Temperature | Keep above freezing; tolerates cool, dry winters |
| Propagation | Seed |
| Toxicity | Non-toxic to cats and dogs |
Eriosyce aurata is a large, barrel-forming cactus from the arid hills and coastal ranges of Chile, and the type species of the genus Eriosyce. Mature plants build a heavy, globe-to-barrel body armed with stout, often curved golden or brown spines and crowned by a dense mat of wool at the apex, making it one of the biggest members of the genus.
Description
Eriosyce aurata forms a solid, ribbed body that begins globular and becomes broadly barrel-shaped with age, in time reaching a substantial size — among the largest of the genus. The numerous ribs carry large areoles set with stout, rigid spines that range from honey-gold to amber and darker brown, sometimes curving inward and giving old plants a formidable, well-armed look. The spination is variable across the species' wide range, which has historically led to a good deal of confusion with related plants.
The growing point is protected by a thick cap of wool, and it is from this woolly apex that the flowers emerge — funnel-shaped blooms in shades of yellow through reddish or pinkish tones, held close to the crown. Flowering is followed by hollow fruits typical of the genus.
Distribution and habitat
The species is native to Chile, where it grows across a broad swathe of the semi-arid interior and coastal ranges, from rocky slopes to open scrub. Across this range it endures strong sun, cool nights and long dry spells, drawing much of its moisture from seasonal rains. Because it occupies such varied ground, wild plants differ considerably in body shape and spine colour from one population to the next — part of why the species has accumulated so many synonyms, including the widely used Eriosyce ceratistes.
Cultivation
Eriosyce aurata is a tough, rewarding plant for a grower who respects its need for sharp drainage. Pot it in a gritty, mostly mineral mix and give it bright light — full sun once acclimatised, which brings out the strongest spine colour. Water moderately through the warm growing season, always letting the soil dry between waterings, then keep the plant dry and cool over winter to prevent rot and encourage flowering.
Like most Chilean cacti it resents sitting wet, especially in cold weather. A generous, well-drained container suits its eventual bulk, and it appreciates good airflow. See Watering and Repotting for general technique.
Propagation
Seed is the standard and most reliable method. The species is solitary and does not readily offset, so there is little scope for vegetative propagation; growers raise new plants from seed sown on a warm, gritty surface and grown on slowly. See Propagation — seed for a full walkthrough.
Common problems
- Rot — the usual cause of loss, from overwatering or a slow-draining mix, particularly during cool winter months.
- Etiolation — too little light produces soft, pale, elongated growth and weak spination instead of a firm, well-armed body.
- Pests — mealybugs (white fluff in the areoles and among the apical wool) and red spider mites are the most common; watch the woolly crown closely, where pests can hide.
See also
- Eriosyce — the genus overview
- Soil and potting mix · Watering · Repotting · Propagation — seed · Pests and diseases