Matucana weberbaueri
| Light | Bright light; full sun to very light shade |
|---|---|
| Water | Moderate in the growing season; keep dry and cool in winter |
| Soil | Gritty, fast-draining mineral mix (see Soil and potting mix) |
| Temperature | Keep above freezing; roughly USDA zones 9b–11 |
| Propagation | Seed (primary); offsets where clustered |
| Toxicity | No toxic compounds recorded; the stiff spines are the main hazard to pets and people |
Matucana weberbaueri is a globular to shortly columnar Andean cactus densely clothed in needle-like golden-yellow spines — darker-tipped and often long — that largely obscure the green body beneath them. From the woolly crown it produces slender, slightly S-curved (zygomorphic) flowers in shades of lemon-yellow to orange, a form typical of the genus Matucana and adapted to hummingbird pollination.
Description
Matucana weberbaueri forms a mostly solitary plant, sometimes offsetting sparingly at the base, globe-shaped when young and lengthening toward a squat cylinder with age. The stem carries many ribs notched into low tubercles that bear closely set areoles, from which radiate numerous straight, needle-like spines. These spines are golden-yellow with darker tips — the plant's most striking feature — the longest reaching several centimetres and densely covering the surface, sometimes ageing to paler straw or amber tones and often largely hiding the body.
The flowers emerge near the apex and show the characteristic Matucana shape: a narrow tube opening to a somewhat two-lipped, slightly tilted mouth rather than a fully symmetrical star. They range from lemon-yellow through to orange, and are borne through the warmer months. As in the rest of the genus, the tube is nearly naked or only sparsely scaly.
Distribution and habitat
The species is endemic to Peru, where it grows on rocky slopes of the inter-Andean Marañón valley at moderate elevation. Plants root among rock and gritty, sharply drained substrates in a climate of strong sun and a pronounced dry season. Like all Matucana, it experiences a summer growing period followed by a dry, cool winter rest — conditions worth mimicking in cultivation.
Cultivation
Matucana weberbaueri is a rewarding grower that appreciates all the light it can get; ample sun helps the golden spination develop to its fullest. Plant it in a gritty, mostly mineral mix with excellent drainage, and water moderately through spring and summer, letting the soil dry between waterings. Reduce water sharply as days shorten and keep the plant dry and cool over winter — this rest both prevents rot and encourages flowering the following season. See Watering and Repotting for general technique.
Grown hard in bright light, plants stay compact and densely spined; too little light causes soft, etiolated growth and thinner spination. It is more tolerant of moisture in growth than many desert cacti but still resents standing wet, so err toward a leaner mix and a snug pot.
Propagation
Seed is the usual and most reliable method: sow on a warm, gritty, moist surface and grow the seedlings on slowly. Where a plant offsets, the pups can be removed once they have their own roots and potted up separately. See Propagation — seed and Propagation — offsets for full walkthroughs.
Common problems
- Rot — usually from overwatering, a slow-draining mix, or water left standing over a cold winter; the base or crown softens and discolours.
- Etiolation — too little light produces pale, elongated growth and sparser, weaker spines, spoiling the compact golden look.
- Pests — red spider mites (fine webbing, bronzed skin) and mealybugs (white fluff among the spines and areoles) are the common culprits; see Pests and diseases.
See also
- Matucana — the genus overview
- Soil and potting mix · Watering · Repotting
- Propagation — seed · Propagation — offsets