Parodia chrysacanthion
| Light | Bright light with some direct sun; a little shade from the fiercest afternoon summer sun |
|---|---|
| Water | Moderate in the growing season, letting the soil dry between waterings; keep dry and cool in winter |
| Soil | Fast-draining mineral mix (see Soil and potting mix) |
| Temperature | Keep cool and dry in winter; will take a light frost if bone dry, but safest kept above freezing (USDA zones 9b–11) |
| Propagation | Seed (primary); rarely offsets |
| Toxicity | Not known to be toxic to cats or dogs; the spines are the main hazard |
Parodia chrysacanthion is a small, solitary, globular cactus from the highlands of northwestern Argentina, prized for its dense cloak of fine, golden-yellow bristly spines. In late winter and early spring the plant crowns itself with a ring of small, glossy yellow flowers, making it one of the earliest and most cheerful bloomers in the Parodia group.
Description
Parodia chrysacanthion forms a flattened globe that slowly becomes shortly cylindrical with age, typically reaching around 10 cm across and up to about 12 cm tall, and usually remaining solitary. The green body is divided into numerous low, spiralling ribs broken into small tubercles, each bearing a woolly areole.
The areoles produce a profusion of thin, straight, bristle-like spines — around 30 to 40 per areole and barely differentiated into centrals and radials — in shades of pale gold to rich golden-yellow, so densely set that they often obscure the body and catch the light attractively. New growth at the crown is woolly and warmly tinted.
Flowers open from the woolly apex, usually several at once in a neat ring. They are small, funnel-shaped and bright yellow with a satiny sheen, appearing earlier in the year than most cacti — often as the plant is just breaking winter dormancy.
Distribution and habitat
The species is native to the province of Jujuy in northwestern Argentina, where it grows at moderate to high elevations (roughly 500–2,500 m) in the eastern Andes. There it roots in rocky, gritty ground on slopes and outcrops within the wooded zone, exposed to strong light and pronounced seasonal swings between a wet summer and a cold, dry winter. This cool, arid winter rest is worth remembering, as it shapes how the plant is best cultivated.
Cultivation
Parodia chrysacanthion is an obliging plant for a keen grower and a good introduction to the genus. Grow it in a very free-draining, mostly mineral mix in a pot only a little wider than the plant, in bright light with a touch of shade from the harshest summer sun. During the warm months water thoroughly once the soil has dried, then let it dry again; the species enjoys a bit more moisture in active growth than many desert cacti, but standing wet is still the quickest route to rot.
Through winter keep the plant cool and dry to give it a genuine rest — this both prevents rot and encourages the reliable early flowering the species is known for. See Watering and Repotting for general technique.
Propagation
Seed is the usual and most reliable method. The fine seed germinates readily on a warm, damp mineral surface kept humid until the seedlings establish; see Propagation — seed for a full walkthrough. Older or stressed plants occasionally produce offsets, which can be removed once they have their own roots and grown on — see Propagation — offsets — though vegetative propagation is far less common than raising plants from seed.
Common problems
- Rot — usually from overwatering, a slow-draining mix, or moisture during the cold winter rest; the plant softens and discolours from the base or crown.
- Etiolation — too little light makes the body pale and stretch, spacing out the ribs and thinning the golden spination.
- Pests — mealybugs (white fluff tucked into the wool and areoles) and red spider mites (fine webbing and a bronzed, dull skin) are the usual offenders. See Pests and diseases.
See also
- Parodia — the genus overview
- Soil and potting mix · Watering · Repotting
- Propagation — seed · Propagation — offsets
- Pests and diseases