Conophytum wittebergense
| Light | Bright, filtered light; morning sun with shade from harsh midday sun |
|---|---|
| Water | Winter-growing; water in autumn and winter, keep dry during summer dormancy |
| Soil | Very gritty, fast-draining mineral mix (see Soil and potting mix) |
| Temperature | Cool, frost-free winters; protect from extreme summer heat |
| Propagation | Seed; division of established clumps |
| Toxicity | Not known to be toxic to cats and dogs |
Conophytum wittebergense is a small, clump-forming dwarf succulent from the winter-rainfall region of South Africa, prized among collectors for the intricate dark dotted and lined patterns that trace across its flattened, patterned tops. Each tiny body is a fused pair of leaves forming a rounded to slightly conical unit, and it is these finely stippled markings — resembling ink flicked across a pale silvery-green surface — that make it one of the most recognisable of the patterned "conos". It belongs to the large genus Conophytum within the ice-plant family (Aizoaceae), and is commonly regarded as one of the many local forms of the widespread and variable Conophytum minimum.
Description
Conophytum wittebergense forms small, tight clusters of individual bodies, each only a centimetre or so across. As in all Conophytum, a body is a single pair of leaves fused almost completely together, leaving only a small slit or fissure at the top from which the flower emerges. The bodies are rounded to gently obconic, with flattened or slightly domed tops.
The species' hallmark is the surface patterning: the upper face is marked with a network of fine dark reddish dots, dashes and short lines, often concentrated toward the margins of the top and around the fissure. In heavily marked plants the lines can merge into an almost blackish mass. The density and arrangement of these markings vary from plant to plant, and this natural variability is much of what makes the species a collector favourite.
Flowers appear in autumn, opening from the fissure. They are small and pale — whitish, pale yellow to soft pink — with narrow, almost spidery petals, and in this species they open at night and are strongly scented. After flowering the plant enters its growth period; in late spring the old leaf pair dries to a papery sheath enclosing the new body forming within.
Distribution and habitat
The species occurs in the arid winter-rainfall areas of the Western Cape of South Africa, in the Witteberg range and the broader Great Karoo interior. Like many small conos it grows in exposed, rocky situations, often tucked into quartz gravel, rock crevices and shallow pockets of mineral soil where its small, patterned bodies blend remarkably well with the surrounding stones.
Plants there endure hot, dry summers by shrinking down and retreating into their dry sheaths, taking up water and growing only through the cooler, moister winter months.
Cultivation
Conophytum wittebergense follows the standard care for winter-growing conos, and the single most important thing to get right is the seasonal watering rhythm. Growth and flowering happen in autumn and winter; the plant rests through the heat of summer. Water regularly (but never to sogginess) from late summer or early autumn through winter, then taper off and keep the plant essentially dry during its summer dormancy, when a papery sheath forms around the new body.
Grow it in a very gritty, mostly mineral mix in a shallow pot, in bright but filtered light. Some direct morning sun helps keep the bodies compact and encourages good pattern and colour, but harsh midday summer sun can scorch the tops. Good airflow and a cool, frost-free winter environment suit it well. See Watering and Repotting for general technique.
The commonest mistake is watering during summer dormancy, which readily causes rot. When in doubt, keep a resting cono dry.
Propagation
Seed is the primary method for the species and the way most of its natural pattern variation is preserved and selected. The fine seed is sown onto a mineral surface and kept humid in the cooler growing season; germination of Conophytum is generally reliable. Established clumps can also be divided: lift and separate rooted heads at the start of the growing season and allow cut surfaces to callus before replanting. See Propagation - seed and Propagation - offsets for fuller walkthroughs.
Common problems
- Rot — almost always from watering during summer dormancy or from a mix that holds too much moisture; the bodies go soft and translucent-brown.
- Scorch — the exposed tops can burn under intense direct sun, especially in summer; give bright but filtered light.
- Etiolation — too little light makes bodies swell, elongate and lose their tight form and crisp patterning.
- Pests — mealybugs (white fluff around the bodies and roots) and, less often, sciarid fly larvae in overly damp mix. See Pests and diseases.
See also
- Conophytum — the genus overview
- Soil and potting mix · Watering · Repotting · Propagation - seed · Propagation - offsets